- History & Society
- Science & Tech
- Biographies
- Animals & Nature
- Geography & Travel
- Arts & Culture
- Games & Quizzes
- On This Day
- One Good Fact
- New Articles
- Lifestyles & Social Issues
- Philosophy & Religion
- Politics, Law & Government
- World History
- Health & Medicine
- Browse Biographies
- Birds, Reptiles & Other Vertebrates
- Bugs, Mollusks & Other Invertebrates
- Environment
- Fossils & Geologic Time
- Entertainment & Pop Culture
- Sports & Recreation
- Visual Arts
- Demystified
- Image Galleries
- Infographics
- Top Questions
- Britannica Kids
- Saving Earth
- Space Next 50
- Student Center
- What is solar energy?
- How is solar energy collected?
renewable energy
Our editors will review what you’ve submitted and determine whether to revise the article.
- U.S. Energy Information Administration - Energy Kids - Energy Sources - Renewable
- Natural Resources Defense Council - Renewable Energy: The Clean Facts
- Energy.gov - Renewable Energy
- United Nations - What is renewable energy?
- World Nuclear Association - Renewable Energy and Electricity
- alternative energy - Children's Encyclopedia (Ages 8-11)
- alternative energy - Student Encyclopedia (Ages 11 and up)
Recent News
renewable energy , usable energy derived from replenishable sources such as the Sun ( solar energy ), wind ( wind power ), rivers ( hydroelectric power ), hot springs ( geothermal energy ), tides ( tidal power ), and biomass ( biofuels ).
At the beginning of the 21st century, about 80 percent of the world’s energy supply was derived from fossil fuels such as coal , petroleum , and natural gas . Fossil fuels are finite resources; most estimates suggest that the proven reserves of oil are large enough to meet global demand at least until the middle of the 21st century. Fossil fuel combustion has a number of negative environmental consequences. Fossil-fueled power plants emit air pollutants such as sulfur dioxide , particulate matter , nitrogen oxides, and toxic chemicals (heavy metals: mercury , chromium , and arsenic ), and mobile sources, such as fossil-fueled vehicles, emit nitrogen oxides, carbon monoxide , and particulate matter. Exposure to these pollutants can cause heart disease , asthma , and other human health problems. In addition, emissions from fossil fuel combustion are responsible for acid rain , which has led to the acidification of many lakes and consequent damage to aquatic life, leaf damage in many forests, and the production of smog in or near many urban areas. Furthermore, the burning of fossil fuels releases carbon dioxide (CO 2 ), one of the main greenhouse gases that cause global warming .
In contrast, renewable energy sources accounted for nearly 20 percent of global energy consumption at the beginning of the 21st century, largely from traditional uses of biomass such as wood for heating and cooking . By 2015 about 16 percent of the world’s total electricity came from large hydroelectric power plants, whereas other types of renewable energy (such as solar, wind, and geothermal) accounted for 6 percent of total electricity generation. Some energy analysts consider nuclear power to be a form of renewable energy because of its low carbon emissions; nuclear power generated 10.6 percent of the world’s electricity in 2015.
Growth in wind power exceeded 20 percent and photovoltaics grew at 30 percent annually in the 1990s, and renewable energy technologies continued to expand throughout the early 21st century. Between 2001 and 2017 world total installed wind power capacity increased by a factor of 22, growing from 23,900 to 539,581 megawatts. Photovoltaic capacity also expanded, increasing by 50 percent in 2016 alone. The European Union (EU), which produced an estimated 6.38 percent of its energy from renewable sources in 2005, adopted a goal in 2007 to raise that figure to 20 percent by 2020. By 2016 some 17 percent of the EU’s energy came from renewable sources. The goal also included plans to cut emissions of carbon dioxide by 20 percent and to ensure that 10 percent of all fuel consumption comes from biofuels . The EU was well on its way to achieving those targets by 2017. Between 1990 and 2016 the countries of the EU reduced carbon emissions by 23 percent and increased biofuel production to 5.5 percent of all fuels consumed in the region. In the United States numerous states have responded to concerns over climate change and reliance on imported fossil fuels by setting goals to increase renewable energy over time. For example, California required its major utility companies to produce 20 percent of their electricity from renewable sources by 2010, and by the end of that year California utilities were within 1 percent of the goal. In 2008 California increased this requirement to 33 percent by 2020, and in 2017 the state further increased its renewable-use target to 50 percent by 2030.
Your Article Library
Energy: short essay on energy.
ADVERTISEMENTS:
Here is your short essay on Energy!
Energy is a primary input for almost all activities and is, therefore, vital for improvement in quality of life. Its use in sector such as industry, commerce, transport, telecommunications, wide range of agriculture and household services has compelled us to focus our attention to ensure its continuous supply to meet our ever increasing demands.
Energy related problems are not new. The energy related problems are as old as 2500 years ago. The early Romans and Greeks faced fuel shortage as wood was their primary source of energy. They had to import wood from very faraway places. Fossil fuel is still the main source of energy. Today we are facing the peak of oil and gas utilization. Fossil fuel resources took millions of years to form and are infinite.
These resources may be exhausted in a few hundred years. Historical evidence shows that world energy demand has increased at almost the same rate as gross world product (GWP). People living in industrialized or developed countries are a relatively small percentage of the world’s total population, but they consume a huge share of the total energy produced in the world.
The main issues regarding the energy problem in urban areas are:
(a) How to utilize the energy from non-renewable sources at their maximum efficiency.
(b) How to make use of renewable sources of energy or the alternative energy sources?
Energy policy today has two choices (paths). One path leads to the fossil fuels (hard path), which means continuing as we have been for a number of years i.e., emphasising energy quantity by finding more amount of fossil fuels and building much larger power plants.
The second path is the soft path which leads to the energy alternatives that emphasize energy quality and are also renewable, flexible and more environmental friendly. The soft path relies mainly on renewable energy i.e. sunlight, wind biomass, tidal energy etc.
There is a need to resort to energy management. This concept recognizes that no single energy source can possibly provide all the energy required by the source nation. Thus, the basic objective of the integrated energy management is to obtain sustainable energy and which should be realized at the local level. In addition, measures to conserve energy need to be followed.
Energy conservation is considered as a quick and economical way to solve the problem of power shortage as also a means of conserving the country’s finite sources of energy. Energy conservation measures are cost effective, require relatively small investments and have short gestation as well as pay back periods. The studies conducted by Energy Management Centre, New Delhi have indicated that there is about 25% potential of energy conservation in the industrial sector.
Related Articles:
- Essay on Urban Problems Related to Energy
- Use of Renewable Energy Resources
No comments yet.
Leave a reply click here to cancel reply..
You must be logged in to post a comment.
Essay on Sources of Energy
Students are often asked to write an essay on Sources of Energy in their schools and colleges. And if you’re also looking for the same, we have created 100-word, 250-word, and 500-word essays on the topic.
Let’s take a look…
100 Words Essay on Sources of Energy
Introduction.
Energy is vital for our daily life. It powers our homes, schools, and cities. Energy comes from different sources, mainly classified into two categories: renewable and non-renewable.
Non-Renewable Energy
Non-renewable energy comes from sources that will run out or will not be replenished in our lifetimes. Examples include oil, natural gas, and coal. These sources are often used to generate electricity.
Renewable Energy
Renewable energy is from sources that never run out or are replenished quickly. Sunlight, wind, water, and geothermal heat are examples. These sources are environmentally friendly but require technology to harness.
Understanding energy sources helps us make informed choices. It’s important to support renewable energy for a sustainable future.
250 Words Essay on Sources of Energy
Energy is the driving force behind all natural and artificial phenomena. It is an indispensable resource in our daily lives, powering our homes, industries, and transportation. The sources of energy can be broadly classified into two categories: renewable and non-renewable.
Non-renewable Energy Sources
Non-renewable energy sources are finite and will eventually deplete. They include fossil fuels such as coal, oil, and natural gas. These energy sources are primarily used for electricity generation and transportation. However, their usage results in harmful environmental impacts, including air pollution and climate change, due to the emission of greenhouse gases.
Renewable Energy Sources
Renewable energy sources, on the other hand, are inexhaustible and can be replenished naturally. They include solar, wind, hydro, geothermal, and biomass energy. Solar energy, harnessed through photovoltaic cells, is a clean and abundant source. Wind energy, captured by wind turbines, is another potent source, especially in coastal and high-altitude regions.
Hydro energy, derived from the kinetic energy of flowing or falling water, is a dominant renewable source, while geothermal energy, obtained from the Earth’s internal heat, is reliable and consistent. Biomass energy, generated from organic materials, can be a sustainable option if managed responsibly.
The transition from non-renewable to renewable energy sources is crucial for sustainable development. While non-renewable sources have been the backbone of our energy infrastructure, their environmental impacts necessitate a shift towards cleaner, renewable sources. This transition is not only an environmental imperative but also an opportunity for economic growth and energy security.
500 Words Essay on Sources of Energy
Non-renewable energy sources.
Non-renewable energy sources are those that do not replenish in a short time. They include fossil fuels such as coal, oil, and natural gas. These energy sources are formed over millions of years from the remains of plants and animals. They are finite and their extraction and use lead to environmental pollution.
Coal, for instance, is used to generate electricity and in industrial processes requiring heat. Its extraction, however, often leads to environmental degradation and health hazards. Oil is used in transportation and manufacturing, but its extraction can lead to oil spills causing severe environmental damage. Natural gas, although cleaner than coal and oil, is still a major contributor to greenhouse gas emissions.
Solar energy harnesses the power of the sun and converts it into electricity. It’s a clean, abundant source of energy, but its efficiency is affected by weather conditions and geographical location. Wind energy converts the kinetic energy of wind into electricity. It’s a clean and renewable source, but its effectiveness is dependent on wind speed and direction.
Hydropower uses the energy of flowing or falling water to generate electricity. It’s renewable and produces a significant amount of electricity, but it can disrupt aquatic ecosystems and requires significant infrastructure. Geothermal energy harnesses the heat from the earth’s crust to generate electricity. It’s a reliable and constant source of energy but its extraction can cause land instability.
The world’s energy needs are diverse and complex. Non-renewable energy sources have been the mainstay of our energy systems, but their environmental impact and finite nature necessitate a shift towards renewable energy sources. However, these too have their challenges. The future of energy therefore lies in a balanced mix of different energy sources, improved energy efficiency, and technological innovations that mitigate the downsides of each source. As we move towards a sustainable future, the understanding and exploration of these energy sources become more crucial than ever.
If you’re looking for more, here are essays on other interesting topics:
Apart from these, you can look at all the essays by clicking here .
Leave a Reply Cancel reply
Save my name, email, and website in this browser for the next time I comment.
If you're seeing this message, it means we're having trouble loading external resources on our website.
If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
To log in and use all the features of Khan Academy, please enable JavaScript in your browser.
- ENVIRONMENT
Renewable energy, explained
Solar, wind, hydroelectric, biomass, and geothermal power can provide energy without the planet-warming effects of fossil fuels.
In any discussion about climate change , renewable energy usually tops the list of changes the world can implement to stave off the worst effects of rising temperatures. That's because renewable energy sources such as solar and wind don't emit carbon dioxide and other greenhouse gases that contribute to global warming .
Clean energy has far more to recommend it than just being "green." The growing sector creates jobs , makes electric grids more resilient, expands energy access in developing countries, and helps lower energy bills. All of those factors have contributed to a renewable energy renaissance in recent years, with wind and solar setting new records for electricity generation .
For the past 150 years or so, humans have relied heavily on coal, oil, and other fossil fuels to power everything from light bulbs to cars to factories. Fossil fuels are embedded in nearly everything we do, and as a result, the greenhouse gases released from the burning of those fuels have reached historically high levels .
As greenhouse gases trap heat in the atmosphere that would otherwise escape into space, average temperatures on the surface are rising . Global warming is one symptom of climate change, the term scientists now prefer to describe the complex shifts affecting our planet’s weather and climate systems. Climate change encompasses not only rising average temperatures but also extreme weather events, shifting wildlife populations and habitats, rising seas , and a range of other impacts .
Of course, renewables—like any source of energy—have their own trade-offs and associated debates. One of them centers on the definition of renewable energy. Strictly speaking, renewable energy is just what you might think: perpetually available, or as the U.S. Energy Information Administration puts it, " virtually inexhaustible ." But "renewable" doesn't necessarily mean sustainable, as opponents of corn-based ethanol or large hydropower dams often argue. It also doesn't encompass other low- or zero-emissions resources that have their own advocates, including energy efficiency and nuclear power.
Types of renewable energy sources
Hydropower: For centuries, people have harnessed the energy of river currents, using dams to control water flow. Hydropower is the world's biggest source of renewable energy by far, with China, Brazil, Canada, the U.S., and Russia the leading hydropower producers . While hydropower is theoretically a clean energy source replenished by rain and snow, it also has several drawbacks.
Large dams can disrupt river ecosystems and surrounding communities , harming wildlife and displacing residents. Hydropower generation is vulnerable to silt buildup, which can compromise capacity and harm equipment. Drought can also cause problems. In the western U.S., carbon dioxide emissions over a 15-year period were 100 megatons higher than they normally would have been, according to a 2018 study , as utilities turned to coal and gas to replace hydropower lost to drought. Even hydropower at full capacity bears its own emissions problems, as decaying organic material in reservoirs releases methane.
Dams aren't the only way to use water for power: Tidal and wave energy projects around the world aim to capture the ocean's natural rhythms. Marine energy projects currently generate an estimated 500 megawatts of power —less than one percent of all renewables—but the potential is far greater. Programs like Scotland’s Saltire Prize have encouraged innovation in this area.
Wind: Harnessing the wind as a source of energy started more than 7,000 years ago . Now, electricity-generating wind turbines are proliferating around the globe, and China, the U.S., and Germany are the leading wind energy producers. From 2001 to 2017 , cumulative wind capacity around the world increased to more than 539,000 megawatts from 23,900 mw—more than 22 fold.
Some people may object to how wind turbines look on the horizon and to how they sound, but wind energy, whose prices are declining , is proving too valuable a resource to deny. While most wind power comes from onshore turbines, offshore projects are appearing too, with the most in the U.K. and Germany. The first U.S. offshore wind farm opened in 2016 in Rhode Island, and other offshore projects are gaining momentum . Another problem with wind turbines is that they’re a danger for birds and bats, killing hundreds of thousands annually , not as many as from glass collisions and other threats like habitat loss and invasive species, but enough that engineers are working on solutions to make them safer for flying wildlife.
You May Also Like
Can energy harnessed from Earth’s interior help power the world?
How the historic climate bill will dramatically reduce U.S. emissions
We took the Great American Road Trip—in electric cars
Solar: From home rooftops to utility-scale farms, solar power is reshaping energy markets around the world. In the decade from 2007 and 2017 the world's total installed energy capacity from photovoltaic panels increased a whopping 4,300 percent .
In addition to solar panels, which convert the sun's light to electricity, concentrating solar power (CSP) plants use mirrors to concentrate the sun's heat, deriving thermal energy instead. China, Japan, and the U.S. are leading the solar transformation, but solar still has a long way to go, accounting for around two percent of the total electricity generated in the U.S. in 2017. Solar thermal energy is also being used worldwide for hot water, heating, and cooling.
Biomass: Biomass energy includes biofuels such as ethanol and biodiesel , wood and wood waste, biogas from landfills, and municipal solid waste. Like solar power, biomass is a flexible energy source, able to fuel vehicles, heat buildings, and produce electricity. But biomass can raise thorny issues.
Critics of corn-based ethanol , for example, say it competes with the food market for corn and supports the same harmful agricultural practices that have led to toxic algae blooms and other environmental hazards. Similarly, debates have erupted over whether it's a good idea to ship wood pellets from U.S. forests over to Europe so that it can be burned for electricity. Meanwhile, scientists and companies are working on ways to more efficiently convert corn stover , wastewater sludge , and other biomass sources into energy, aiming to extract value from material that would otherwise go to waste.
Geothermal: Used for thousands of years in some countries for cooking and heating, geothermal energy is derived from the Earth’s internal heat . On a large scale, underground reservoirs of steam and hot water can be tapped through wells that can go a mile deep or more to generate electricity. On a smaller scale, some buildings have geothermal heat pumps that use temperature differences several feet below ground for heating and cooling. Unlike solar and wind energy, geothermal energy is always available, but it has side effects that need to be managed, such as the rotten egg smell that can accompany released hydrogen sulfide.
Ways to boost renewable energy
Cities, states, and federal governments around the world are instituting policies aimed at increasing renewable energy. At least 29 U.S. states have set renewable portfolio standards —policies that mandate a certain percentage of energy from renewable sources, More than 100 cities worldwide now boast at least 70 percent renewable energy, and still others are making commitments to reach 100 percent . Other policies that could encourage renewable energy growth include carbon pricing, fuel economy standards, and building efficiency standards. Corporations are making a difference too, purchasing record amounts of renewable power in 2018.
Wonder whether your state could ever be powered by 100 percent renewables? No matter where you live, scientist Mark Jacobson believes it's possible. That vision is laid out here , and while his analysis is not without critics , it punctuates a reality with which the world must now reckon. Even without climate change, fossil fuels are a finite resource, and if we want our lease on the planet to be renewed, our energy will have to be renewable.
Related Topics
- SUSTAINABILITY
- RENEWABLE ENERGY
- GEOTHERMAL ENERGY
- SOLAR POWER
- HYDROELECTRIC POWER
- CLIMATE CHANGE
5 environmental victories from 2021 that offer hope
Activists fear a new threat to biodiversity—renewable energy
How the Ukraine war is accelerating Germany's renewable energy transition
3 ways COVID-19 is making us rethink energy and emissions
Let’s not waste this crucial moment: We need to stop abusing the planet
- Best of the World
- Interactive Graphic
- Environment
- Paid Content
History & Culture
- History & Culture
- Out of Eden Walk
- Mind, Body, Wonder
- Terms of Use
- Privacy Policy
- Your US State Privacy Rights
- Children's Online Privacy Policy
- Interest-Based Ads
- About Nielsen Measurement
- Do Not Sell or Share My Personal Information
- Nat Geo Home
- Attend a Live Event
- Book a Trip
- Inspire Your Kids
- Shop Nat Geo
- Visit the D.C. Museum
- Learn About Our Impact
- Support Our Mission
- Advertise With Us
- Customer Service
- Renew Subscription
- Manage Your Subscription
- Work at Nat Geo
- Sign Up for Our Newsletters
- Contribute to Protect the Planet
Copyright © 1996-2015 National Geographic Society Copyright © 2015-2024 National Geographic Partners, LLC. All rights reserved
- Clean energy
- The advantages and disadvan...
The advantages and disadvantages of renewable energy
- Share to LinkedIn
- Share to Facebook
- Kerry Thoubboron
As subject matter experts, we provide only objective information. We design every article to provide you with deeply-researched, factual, useful information so that you can make informed home electrification and financial decisions. We have:
Sourced the majority of our data from hundreds of thousands of quotes through our own marketplace.
Incorporated third-party data and information from primary sources, government agencies, educational institutions, peer-reviewed research, or well-researched nonprofit organizations.
Built our own database and rating system for solar equipment, including solar panels, inverters, and batteries.
We won't charge you anything to get quotes through our marketplace. Instead, installers and other service providers pay us a small fee to participate after we vet them for reliability and suitability. To learn more, read about how we make money and our Editorial Guidelines .
As we move toward a zero-carbon future, wind power, geothermal energy, solar energy, hydropower, tidal energy, hydrogen, and other renewable technologies are becoming widely popular energy sources worldwide. Countries, corporations, and individuals are adopting clean energy for several great benefits, from reduced air pollution to financial savings. In this article, we’ll dive into some of the advantages and disadvantages of renewable energy .
- 100% free to use, 100% online
- Access the lowest prices from installers near you
- Unbiased Energy Advisors ready to help
Here are some of the most important pros and cons of using clean, renewable energy:
| Renewable energy has high upfront costs. | |||
| Renewable energy has lower maintenance requirements. | Renewable energy is intermittent. | ||
| Renewables save money. | Renewables have limited storage capabilities. | ||
| Renewable energy has numerous environmental benefits. | Renewable energy sources have geographic limitations. | ||
| Renewables lower reliance on foreign energy sources. | Renewables aren’t always 100% carbon-free. | ||
| Renewable energy leads to cleaner water and air. | |||
| Renewable energy creates jobs. | |||
| Renewable energy can cut down on waste. | |||
What Is Energy?
The classical description of energy is the ability of a system to perform work, but as energy exists in so many forms, it is hard to find one comprehensive definition. It is the property of an object that can be transferred from one object to another or converted to different forms but cannot be created or destroyed. There are numerous sources of energy. In the next few sections, let us discuss the about different sources of energy in detail.
Sources Of Energy
Sources of energy can be classified into:
- Renewable Sources
- Non-renewable Sources
Renewable sources of energy are available plentiful in nature and are sustainable. These resources of energy can be naturally replenished and are safe for the environment.
Examples of renewable sources of energy are : Solar energy, geothermal energy, wind energy, biomass, hydropower and tidal energy.
A non-renewable resource is a natural resource that is found underneath the earth. These type of energy resources do not replenish at the same speed at which it is used. They take millions of years to replenish. The main examples of non-renewable resources are coal, oil and natural gas.
Examples of non-renewable sources of energy are: Natural gas, coal, petroleum, nuclear energy and hydrocarbon gas liquids.
Difference between Renewable and Non-renewable Sources of Energy
| The resources that can be renewed once they are consumed are called renewable sources of energy. | The resources that cannot be renewed once they are consumed are called non-renewable sources of energy. |
| These resources do not cause any environmental pollution. | These resources cause environmental pollution. |
| Renewable resources are inexhaustible. | Non- Renewable resources are exhaustible. |
| Renewable resources are not affected by human activities. | Non- Renewable resources are affected by human activities. |
| Examples of Renewable resources- Air, water and solar energy. | Examples of Non-renewable resources- natural gas, coal and nuclear energy. |
Natural Sources of Energy
During the stone age, it was wood. During the iron age, we had coal. In the modern age, we have fossil fuels like petroleum and natural gas. So how do we choose the source of energy?
Good sources of energy should have the following qualities:
- Optimum heat production per unit of volume/mass used
- Easy to transport
- Least Polluting
Types of Natural Sources of Energy
There are two types of natural sources of energy classified by their popularity and use,
- Conventional Sources of Energy
- Non-Conventional Sources of Energy
Difference between Conventional and Non-conventional Sources of Energy
| These resources are exhaustible. | These resources are inexhaustible. |
| These resources cause pollution as they emit smoke and ash. | These resources are usually pollution-free. |
| These resources are very expensive to be maintained, stored and transmitted. | These resources are less expensive for local use and can easily be maintained. |
| Examples- coal, natural gas, petroleum, and water power. | Examples- solar, biomass, wind, biogas, and tidal, geothermal. |
In this article, you learned about natural resources, energy sources, and what makes a good source of energy. Explore more such articles at BYJU’S, which provides detailed solutions to the questions of NCERT Book for the energy source so that one can compare their answers with the sample answers given for this chapter.
Frequently Asked Questions – FAQs
What sources of energy are renewable.
- Biomass energy
- Wind energy
- Tidal energy
- Hydro energy
What is the main source of energy in India?
What are the sources of energy in india.
Following are the sources of energy in India:
- Natural gas
- Thermal energy
- Mineral oil
Can any source of energy be pollution-free?
What are the advantages and disadvantages of wind power.
- There are no harmful gases released into the environment.
- It is a way for the generation of revenue in the local communities.
- It is one of the clean sources of energy.
Disadvantages:
- The storage of energy needs to be improved.
- The initial setup requires a lot of investment.
- Numerous lands will be used up.
List the examples of sources of energy
- Biofuel energy
- Geothermal energy
- Solar energy
- Nuclear energy
Watch the video and find out conservation measures we can take to save the natural resources depleting at an alarming rate.
Stay tuned with BYJU’S for more such interesting articles. Also, register to “BYJU’S – The Learning App” for loads of interactive, engaging Physics-related videos and unlimited academic assistance.
Put your understanding of this concept to test by answering a few MCQs. Click ‘Start Quiz’ to begin!
Select the correct answer and click on the “Finish” button Check your score and answers at the end of the quiz
Visit BYJU’S for all Physics related queries and study materials
Your result is as below
Request OTP on Voice Call
| PHYSICS Related Links | |
Leave a Comment Cancel reply
Your Mobile number and Email id will not be published. Required fields are marked *
Post My Comment
Register with BYJU'S & Download Free PDFs
Register with byju's & watch live videos.
ENCYCLOPEDIC ENTRY
Renewable resources.
Renewable resources are an energy source that cannot be depleted and are able to supply a continuous source of clean energy.
Geology, Earth Science, Engineering, Physics
Geothermal power is a form of renewable energy created by powering electrical generators with the heat of the earth and naturally occurring subterranean hot water reservoirs.
Photograph by stockphoto52
When it comes to energy resources, there is always the question of sustainability. It is important that resources provide enough energy to meet our needs—to heat our houses, power our cities, and run our cars. However, it is also important to consider how these resources can be used long term. Some resources will practically never run out. These are known as renewable resources . Renewable resources also produce clean energy , meaning less pollution and greenhouse gas emissions, which contribute to climate change.
The United States’ energy sources have evolved over time, from using wood prior to the 19th century to later adopting nonrenewable resources, such as fossil fuels, petroleum, and coal, which are still the dominant sources of energy today. But Earth has a limited supply of these resources. Recently, renewable resource use has begun to increase. According to the U.S. Environmental Protection Agency, 11 percent of the nation's energy consumption came from renewable resources in 2017.
There are some challenges associated with using renewable resources . For instance, renewable energy can be less reliable than non renewable energy , with seasonal or even daily changes in the amount produced. However, scientists are continually addressing these challenges, working to improve feasibility and reliability of renewable resources .
Renewable resources include biomass energy (such as ethanol ), hydropower, geothermal power , wind energy , and solar energy .
Biomass refers to organic material from plants or animals. This includes wood, sewage, and ethanol (which comes from corn or other plants). Biomass can be used as a source of energy because this organic material has absorbed energy from the Sun. This energy is, in turn, released as heat energy when burned.
Hydropower is one of the oldest renewable resources and has been used for thousands of years. Today, every U.S. state uses some amount of hydroelectricity. With hydropower, the mechanical energy from flowing water is used to generate electricity. Hydroelectric power plants use the flow of rivers and streams to turn a turbine to power a generator, releasing electricity.
Geothermal energy comes from the heat generated deep within Earth’s core. Geothermal reservoirs can be found at tectonic plate boundaries near volcanic activity or deep underground. Geothermal energy can be harnessed by drilling wells to pump hot water or steam to a power plant . This energy is then used for heating and electricity.
Wind energy generates electricity by turning wind turbines . The wind pushes the turbine’s blades, and a generator converts this mechanical energy into electricity. This electricity can supply power to homes and other buildings, and it can even be stored in the power grid .
Radiation from the sun can be used as a power source as well. Photovoltaic cells can be used to convert this solar energy into electricity. Individually, these cells only generate enough energy to power a calculator, but when combined to create solar panels or even larger arrays, they provide much more electricity.
Searching for the right method of using renewable resources is a task that is growing ever more important as Earth’s supply of nonrenewable resources continues to dwindle. Converting to renewable energy will not only better sustain the world’s rapidly growing population, but it will also provide a cleaner, healthier environment for the generations to come.
Media Credits
The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. The Rights Holder for media is the person or group credited.
Production Managers
Program specialists, last updated.
April 3, 2024
User Permissions
For information on user permissions, please read our Terms of Service. If you have questions about how to cite anything on our website in your project or classroom presentation, please contact your teacher. They will best know the preferred format. When you reach out to them, you will need the page title, URL, and the date you accessed the resource.
If a media asset is downloadable, a download button appears in the corner of the media viewer. If no button appears, you cannot download or save the media.
Text on this page is printable and can be used according to our Terms of Service .
Interactives
Any interactives on this page can only be played while you are visiting our website. You cannot download interactives.
Related Resources
Essay on Renewable Energy
Introduction to Renewable Energy
In the quest for a sustainable and environmentally conscious future, adopting renewable energy has emerged as a pivotal solution to mitigate the challenges posed by traditional fossil fuels. Take, for instance, the remarkable growth of solar power in countries like Germany, where the “Energiewende” policy has catapulted them to the forefront of green energy innovation. This transformative journey showcases the potential of harnessing solar energy as an alternative and a cornerstone for economic prosperity, reduced carbon emissions, and heightened energy security. As we delve into the world of renewable energy, it becomes evident that these innovations are key to shaping a cleaner, more resilient global energy landscape.
Importance of Transitioning to Renewable Sources
A sustainable future and resolving numerous global issues depend heavily on the switch to renewable energy sources. This shift is crucial for several reasons:
Watch our Demo Courses and Videos
Valuation, Hadoop, Excel, Mobile Apps, Web Development & many more.
- Environmental Preservation: Fossil fuel combustion contributes significantly to air and water pollution and climate change. Transitioning to renewables reduces greenhouse gas emissions, mitigates environmental degradation, and helps preserve ecosystems.
- Climate Change Mitigation: Renewable energy is a key player in mitigating climate change . Reducing greenhouse gas emissions, including carbon dioxide, is crucial to prevent catastrophic outcomes such as extreme weather events and rising sea levels.
- Energy Security: Wind and solar power, as renewable energy sources, provide a diverse and decentralized energy supply. This reduces dependence on finite and geopolitically sensitive fossil fuel reserves, enhancing energy security and resilience.
- Economic Opportunities: The renewable energy sector fosters job creation and economic growth. Investments in clean energy technologies stimulate innovation, create employment opportunities, and contribute to developing a robust and sustainable economy.
- Public Health Improvement: Transitioning away from fossil fuels decreases the release of harmful pollutants, leading to improved air and water quality. This, in turn, positively impacts public health by reducing respiratory illnesses and other pollution-related diseases.
- Resource Conservation: Unlike finite fossil fuel reserves, renewable sources are inherently sustainable and inexhaustible. By harnessing the power of sunlight, wind, water, and geothermal heat, societies can meet their energy needs without depleting limited natural resources.
- Technological Advancements: The transition to renewables drives innovation and technological advancements. Research and development in clean energy technologies contribute to a cleaner environment and the advancement of scientific knowledge and industrial capabilities.
- Global Cooperation: The shift to renewable energy encourages international collaboration to address shared challenges. Collaborative efforts in research, development, and the adoption of clean energy technologies can foster diplomatic ties and strengthen global cooperation.
Types of Renewable Energy
Sources naturally replenished on a human timescale, making them sustainable and environmentally friendly, derive renewable energy. Listed below are the main types of renewable energy:
- Solar Power: While solar thermal systems use sunshine to heat a fluid that produces steam to power turbines, photovoltaic cells use sunlight to convert light into energy.
- Wind Energy: Wind turbines are machines that use the wind’s kinetic energy to generate electricity through wind energy. When the wind rotates the turbine blades, a generator transforms that rotational energy into electrical energy. Onshore or offshore locations often host wind farms.
- Hydropower: Hydropower produces electricity by harnessing the energy of flowing water. Run-of-river systems divert a portion of a river’s flow, while dam-based hydropower involves the controlled release of stored water through turbines to generate power.
- Biomass Energy: Organic materials like wood, agricultural waste, and agricultural residues produce biomass energy. Biomass can produce heat, electricity, and biofuels through combustion or anaerobic digestion, offering a versatile energy source.
- Geothermal Energy: Geothermal energy taps into the Earth’s internal heat by harnessing steam or hot water beneath the Earth’s surface. Geothermal power plants convert this thermal energy into electricity, providing a consistent and reliable power source.
- Tidal Energy: Tidal energy harnesses the moon’s and sun’s gravitational pull to create electricity as the tides rise and fall. Utilizing underwater turbines allows tidal stream devices to capture the energy of the water’s flow.
- Wave Energy: Wave energy captures the motion of ocean waves to generate electricity. Wave energy converters, including point absorbers and oscillating water columns, convert waves’ up and down motion into usable power.
- Hydrogen Energy: Hydrogen, often considered a carrier of energy, can be produced through electrolysis using renewable electricity. It is a clean fuel for various applications, including transportation and industrial processes, emitting only water vapor when used.
Technological advancements
Technological breakthroughs have shaped the modern world, revolutionizing industries and elevating people’s standard of living. Several key areas highlight the profound impact of technology on society:
- Information Technology (IT): The evolution of IT has transformed communication, information access, and business operations. The development of the Internet, cloud computing , and mobile technologies has facilitated instantaneous global communication, d ata storage , and access to vast amounts of information.
- Artificial Intelligence & Machine Learning: AI and ML have ushered in a new era of automation and decision-making capabilities. From autonomous vehicles to predictive analytics in healthcare, these technologies continue to enhance efficiency, accuracy, and problem-solving across various industries.
- Biotechnology: Advances in biotechnology have revolutionized healthcare, agriculture, and environmental conservation. Gene editing tools like CRISPR-Cas9 offer unprecedented possibilities in treating genetic disorders, while biotech applications in agriculture improve crop yield and resilience.
- Renewable Energy Technologies: Clean energy generation is now more economical and efficient thanks to renewable energy technology, including energy storage systems, wind turbines, and solar panels. These innovations are pivotal in addressing environmental challenges and promoting sustainable practices.
- Nanotechnology: Nanotechnology manipulates materials at the atomic or molecular level. Nanotechnology has transformed the fields of materials science, electronics, and medicine. As a result, scientists have created sophisticated materials with unique qualities, developed more compact and potent electrical devices, and improved medication delivery methods.
- 3D Printing: Layer-by-layer construction of three-dimensional items is possible with additive manufacturing, also known as 3D printing. This technology utilizes diverse applications, from prototyping and manufacturing to healthcare, producing custom implants and prosthetics.
- Blockchain Technology: The decentralized and secure ledger technology known as blockchain powers cryptocurrencies such as Bitcoin . Beyond finance, it finds applications in supply chain management , voting systems, and ensuring the integrity and transparency of various processes.
- Quantum Computing: Using the ideas of quantum mechanics, quantum computing can execute intricate calculations at a pace impossible for conventional computers. This can potentially revolutionize fields such as cryptography, optimization problems, and drug discovery.
- Internet of Things (IoT): The technology known as the Internet of Things (IoT) enables commonplace objects to be linked to the Internet and gather and share data. This interconnectedness enhances efficiency in smart homes, cities, and industries, optimizing resource utilization and overall productivity.
- Augmented and Virtual Reality (AR/VR): AR and VR technologies immerse users in virtual or augmented environments, transforming experiences in fields like gaming, education, healthcare, and training simulations.
Challenges and Solutions
Addressing the challenges posed by technological advancements, societal changes, and global issues requires proactive strategies and innovative solutions. Here are some main challenges and possible solutions:
- Cybersecurity Threats:
- Challenge: Due to the growing interconnectivity of systems and the dependence on digital technology, individuals and organizations are more vulnerable to cyber threats such as ransomware attacks and data breaches.
- Solution: Implementing robust cybersecurity measures, regular updates, and user education can help mitigate cyber risks. Collaboration between governments, industries, and cybersecurity experts is crucial for developing effective strategies.
- Privacy Concerns:
- Challenge: The collection and utilization of personal data by companies and governments raise concerns about privacy infringement.
- Solution: Implemented to safeguard people’s privacy rights, GDPR (the General Data Protection Regulation) and other stricter laws and policies exist. Innovations like privacy-enhancing technologies and decentralized identity solutions offer alternative approaches.
- Job Displacement Due to Automation:
- Challenge: Automation and artificial intelligence technologies can lead to job displacement and economic inequality.
- Solution: Reskilling and upskilling programs and focusing on education in emerging fields can prepare the workforce for the changing job landscape. Social policies like universal basic income (UBI) may provide a safety net during transitions.
- Environmental Degradation:
- Challenge: Industrial activities and resource exploitation contribute to environmental degradation, climate change, and biodiversity loss.
- Solution: Sustainable practices, renewable energy adoption, and circular economy principles can mitigate environmental impact. International cooperation and stringent environmental regulations also play a crucial role.
- Ethical Concerns in AI:
- Challenge: Ethical issues surrounding artificial intelligence include biased algorithms, lack of transparency, and potential misuse.
- Solution: Implementing ethical guidelines and standards for AI development, promoting transparency in algorithms, and fostering interdisciplinary collaboration on AI ethics can help address these concerns.
- Healthcare Access Disparities:
- Challenge: Access to quality healthcare is unique globally, with disparities exacerbated by factors such as geography and socioeconomic status.
- Solution: Telemedicine, mobile health applications, and innovative healthcare delivery models can improve access. International collaborations and investment in healthcare infrastructure can reduce disparities.
- Digital Inequality:
- Challenge: Not everyone has equal access to digital technologies, leading to disparities in education, economic opportunities, and social inclusion.
- Solution: Initiatives focusing on digital literacy, affordable internet access, and technology inclusion programs can bridge the digital divide. Governments and organizations can also invest in infrastructure to expand connectivity.
- Global Public Health Crises:
- Challenge: Events like pandemics can strain healthcare systems, disrupt economies, and create social upheaval.
- Solution: Preparedness plans, early warning systems, and international cooperation in research and resource allocation are crucial. Advances in biotechnology and data analytics can aid in swift responses.
- Ethical Use of Biotechnology:
- Challenge: Biotechnological advancements like gene editing raise ethical concerns about human enhancement and unintended consequences.
- Solution: Robust ethical frameworks, public engagement, and interdisciplinary dialogues involving ethicists, scientists, and policymakers can guide responsible biotechnological development.
- Energy Transition Challenges:
- Challenge: Shifting from traditional to renewable energy sources faces infrastructure, economic viability, and societal acceptance challenges.
- Solution: Government incentives, public awareness campaigns, and investment in research and development can accelerate the transition. Community involvement and stakeholder engagement are critical for successful adoption.
Global Initiatives and Policies
Global initiatives and policies play a pivotal role in shaping the trajectory of technological, economic, and environmental progress. These initiatives often reflect the collective effort of nations to address shared challenges and promote cooperation in various domains. Here are some notable global initiatives and policies:
- Paris Agreement: Global leaders reached a global agreement to keep the rise in temperature to less than 2°C above pre-industrial levels. Nations aim to enhance climate resilience while reducing greenhouse gas emissions.
- United Nations Sustainable Development Goals (SDGs): The 17 goals address global issues, including poverty, inequality, and environmental sustainability. Goal 7 targets explicitly affordable and clean energy, promoting the transition to renewable sources.
- IRENA(International Renewable Energy Agency): An intergovernmental organization promoting the widespread use of renewable energy. IRENA facilitates cooperation among nations, provides policy advice, and supports capacity building for renewable energy projects.
- Clean Energy Ministerial (CEM): A forum bringing together energy ministers from various nations to promote clean energy policies, share best practices, and collaborate on initiatives to advance the global transition to low-carbon technologies.
- Mission Innovation: A global initiative involving 24 countries and the European Union, committed to doubling public investment in clean energy research and development over five years. It aims to accelerate innovation and make clean energy more affordable.
- European Green Deal: An ambitious EU policy framework aiming for climate neutrality by 2050. It describes plans to lower greenhouse gas emissions, support renewable energy, and completely revamp the European economy.
- Renewable Energy Policies at National Levels: Many countries have established specific policies and targets to promote renewable energy adoption. Examples include Germany’s Energiewende, India’s National Solar Mission, and China’s commitment to peak carbon emissions by 2030.
- Power Africa: An initiative by the U.S. government to increase access to electricity in sub-Saharan Africa. Its main objectives are to encourage investment in the region’s power sector and to facilitate the development of renewable energy projects.
- Global Geothermal Alliance: Launched at COP21, the alliance promotes geothermal energy deployment worldwide. It encourages collaboration between governments, development partners, and the private sector to harness the potential of geothermal resources.
- ESMAP (World Bank’s Energy Sector Management Assistance Program): ESMAP supports developing countries in building sustainable energy systems. It provides technical assistance, policy advice, and financial support for projects promoting renewable energy and energy efficiency.
Case Studies
- Germany’s Energiewende: Germany’s ambitious energy transition, known as Energiewende, aims to shift from conventional energy sources to renewable energy. The country has made significant investments in wind and solar energy, enacted energy-saving measures, and plans to phase out nuclear power. The Energiewende case study exemplifies the integration of renewables into the energy mix and the challenges of maintaining grid balance during this transition.
- China’s Renewable Energy Expansion: China has become a global leader in renewable energy deployment. The country has significantly invested in wind and solar energy projects, increasing capacity. The case study explores China’s policy incentives, market dynamics, and technological advancements that have facilitated its rapid expansion in the renewable energy sector.
- Denmark’s Wind Power Success: Denmark has been a pioneer in wind energy, with wind power contributing significantly to its electricity generation. The case study delves into Denmark’s wind energy policies, including favorable regulatory frameworks, community engagement, and advancements in wind turbine technology. It highlights the economic and environmental benefits of widespread wind power adoption.
- California’s Renewable Energy Leadership: In the US, California has used renewable energy. The state’s case study examines its aggressive renewable portfolio standards, innovative policies promoting solar power, and the role of technology companies in driving clean energy initiatives. California’s experience demonstrates the potential for subnational entities to lead in renewable energy transitions.
- Rural Electrification in India through Solar Power: India’s case study focuses on rural electrification efforts using solar power. Initiatives like the National Solar Mission and off-grid solar projects have brought electricity to remote areas, transforming lives and fostering economic development. The study explores the challenges faced and lessons learned in scaling up solar energy access in a diverse and populous country.
- Costa Rica’s Renewable Energy Achievement: Costa Rica stands out for achieving high levels of renewable energy generation, primarily from hydropower, wind, and geothermal sources. The case study examines the country’s commitment to environmental sustainability, policies promoting clean energy, and the role of hydropower in maintaining a reliable and renewable energy supply.
- South Australia’s Grid Transformation: South Australia’s case study illustrates its transition to a renewable energy-dominant grid. The state has faced challenges related to grid stability and intermittency but has also demonstrated successful integration of wind and solar power. The study delves into the policy measures, technological solutions, and lessons learned in South Australia’s journey toward a low-carbon energy system.
- Morocco’s Concentrated Solar Power Project: Morocco’s case study focuses on the Noor Ouarzazate Solar Complex, one of the world’s most significant concentrated solar power projects. The initiative aims to harness solar energy for electricity generation, reduce dependence on fossil fuels, and contribute to national energy security. The study explores the project’s technological innovations, financing models, and the impact on Morocco’s energy landscape.
Future Prospects
The future of energy holds exciting possibilities as technological advancements and evolving societal priorities shape the landscape. Several key prospects are likely to influence the trajectory of the global energy sector:
- Emerging Technologies: Ongoing research and development in renewable energy technologies will likely yield breakthroughs in efficiency, cost-effectiveness, and energy storage. Innovations such as advanced solar cells, next-generation wind turbines, and novel energy storage solutions will be crucial in shaping the future energy landscape.
- Tidal and Wave Energy: Tidal and wave energy, largely untapped at present, hold significant potential for sustainable power generation. As technologies mature, harnessing the kinetic energy of ocean tides and waves could contribute to a more diverse and reliable renewable energy mix.
- Advanced Solar Technologies: Continued advancements in solar technologies, including thin-film solar cells, tandem solar cells, and solar paint, are anticipated. These innovations aim to enhance the efficiency of solar energy capture and broaden its applications across various industries.
- Integration into Various Sectors: One of the most important aspects of the energy landscape of the future is integrating renewable energy into various sectors, including industrial processes and transportation. Electric vehicles, green hydrogen production, and sustainable manufacturing will likely gain prominence.
- Energy Transition in Developing Countries: A significant role in the global energy transition is expected to be played by developing countries. International collaborations, financial support, and technology transfer will empower these nations to leapfrog traditional fossil fuel-dependent phases of development and embrace cleaner energy solutions.
- Smart Grids and Energy Storage: Deploying smart power grids, in conjunction with advanced energy storage solutions, will simplify the integration of renewable energy resources in existing power systems. Battery technologies, grid-scale storage, and demand-response mechanisms will enhance grid reliability and flexibility.
- Decentralized Energy Systems: Decentralized energy systems, such as community microgrids and distributed energy resources, will likely become more prevalent. These systems empower communities to generate, store, and manage their energy locally, promoting resilience and energy independence.
- Circular Economy in Energy: The adoption of circular economy principles in the energy sector will gain traction, emphasizing resource efficiency, recycling, and waste reduction. This strategy seeks to mitigate the harmful consequences of energy production and consumption on nature.
- Policy and Regulatory Shifts: Governments worldwide are expected to implement more ambitious policies and regulations to accelerate the transition to renewable energy. Carbon pricing, renewable energy mandates, and incentives for sustainable practices will shape the regulatory environment.
- Global Collaboration: International cooperation and collaboration will be crucial for addressing global energy challenges. Shared research initiatives, technology transfer, and joint efforts to combat climate change will foster a collective approach to building a sustainable energy future.
The global shift towards renewable energy is pivotal in fostering a sustainable future. The imperative to mitigate climate change, ensure energy security, and promote economic prosperity underscores the significance of embracing clean technologies. The trajectory towards a low-carbon energy landscape becomes increasingly tangible as nations unite in initiatives like the Paris Agreement and implement robust policies. The successes of case studies from Germany to China demonstrate the feasibility and benefits of renewable energy adoption. By continuing to innovate, invest, and collaborate, humanity can unlock the full potential of renewable sources, ensuring a resilient and environmentally responsible energy paradigm for generations to come.
*Please provide your correct email id. Login details for this Free course will be emailed to you
By signing up, you agree to our Terms of Use and Privacy Policy .
Valuation, Hadoop, Excel, Web Development & many more.
Forgot Password?
This website or its third-party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to our Privacy Policy
Explore 1000+ varieties of Mock tests View more
Submit Next Question
🚀 Limited Time Offer! - 🎁 ENROLL NOW
Energy Conservation Essay for Students and Children
500 words energy conservation essay.
Energy conservation refers to the efforts made to reduce the consumption of energy. The energy on Earth is not in unlimited supply. Furthermore, energy can take plenty of time to regenerate. This certainly makes it essential to conserve energy. Most noteworthy, energy conservation is achievable either by using energy more efficiently or by reducing the amount of service usage.
Importance of Energy Conservation
First of all, energy conservation plays an important role in saving non-renewable energy resources. Furthermore, non-renewable energy sources take many centuries to regenerate. Moreover, humans consume energy at a faster rate than it can be produced. Therefore, energy conservation would lead to the preservation of these precious non-renewable sources of energy.
Energy conservation will reduce the expenses related to fossil fuels. Fossil fuels are very expensive to mine. Therefore, consumers are required to pay higher prices for goods and services. Energy conservation would certainly reduce the amount of fossil fuel being mined. This, in turn, would reduce the costs of consumers.
Consequently, energy conservation would strengthen the economy as consumers will have more disposable income to spend on goods and services.
Energy conservation is good for scientific research. This is because; energy conservation gives researchers plenty of time to conduct researches.
Therefore, these researchers will have more time to come up with various energy solutions and alternatives. Humans must ensure to have fossil fuels as long as possible. This would give me enough time to finding practical solutions.
Get the huge list of more than 500 Essay Topics and Ideas
Another important reason for energy conservation is environmental protection. This is because various energy sources are significantly harmful to the environment. Furthermore, the burning of fossil fuels considerably pollutes the atmosphere. Moreover, nuclear energy creates dangerous nuclear waste. Hence, energy conservation will lead to environmental protection.
Energy conservation would also result in the good health of humans. Furthermore, the pollution released due to energy sources is harmful to the human body. The air pollution due to fossil fuels can cause various respiratory problems. Energy sources can pollute water which could cause several harmful diseases in humans. Nuclear waste can cause cancer and other deadly problems in the human body.
Measures to Conserve Energy
Energy taxation is a good measure from the government to conserve energy. Furthermore, several countries apply energy or a carbon tax on energy users. This tax would certainly put pressure on energy users to reduce their energy consumption. Moreover, carbon tax forces energy users to shift to other energy sources that are less harmful.
Building design plays a big role in energy conservation. An excellent way to conserve energy is by performing an energy audit in buildings. Energy audit refers to inspection and analysis of energy use in a building. Most noteworthy, the aim of the energy audit is to appropriately reduce energy input.
Another important way of energy conservation is by using energy-efficient products. Energy-efficient products are those that use lesser energy than their normal counterparts. One prominent example can be using an energy-efficient bulb rather than an incandescent light bulb.
In conclusion, energy conservation must be among the utmost priorities of humanity. Mahatma Gandhi was absolutely right when he said, “the earth provides enough to satisfy every man’s needs but not every man’s greed”. This statement pretty much sums up the importance of energy conservation. Immediate implementation of energy conservation measures is certainly of paramount importance.
FAQs on Energy Conservation
Q1 state one way in which energy conservation is important.
A1 One way in which energy conservation is important is that it leads to the preservation of fossil fuels.
Q2 Why energy taxation is a good measure to conserve energy?
A2 Energy taxation is certainly a good measure to conserve energy. This is because energy taxation puts financial pressure on energy users to reduce their energy consumption.
Customize your course in 30 seconds
Which class are you in.
- Travelling Essay
- Picnic Essay
- Our Country Essay
- My Parents Essay
- Essay on Favourite Personality
- Essay on Memorable Day of My Life
- Essay on Knowledge is Power
- Essay on Gurpurab
- Essay on My Favourite Season
- Essay on Types of Sports
Leave a Reply Cancel reply
Your email address will not be published. Required fields are marked *
Download the App
Search the United Nations
- What Is Climate Change
- Myth Busters
- Renewable Energy
- Finance & Justice
- Initiatives
- Sustainable Development Goals
- Paris Agreement
- Climate Ambition Summit 2023
- Climate Conferences
- Press Material
- Communications Tips
What is renewable energy?
Renewable energy is energy derived from natural sources that are replenished at a higher rate than they are consumed. Sunlight and wind, for example, are such sources that are constantly being replenished. Renewable energy sources are plentiful and all around us.
Fossil fuels - coal, oil and gas - on the other hand, are non-renewable resources that take hundreds of millions of years to form. Fossil fuels, when burned to produce energy, cause harmful greenhouse gas emissions, such as carbon dioxide.
Generating renewable energy creates far lower emissions than burning fossil fuels. Transitioning from fossil fuels, which currently account for the lion’s share of emissions, to renewable energy is key to addressing the climate crisis.
Renewables are now cheaper in most countries, and generate three times more jobs than fossil fuels.
Here are a few common sources of renewable energy:
SOLAR ENERGY
Solar energy is the most abundant of all energy resources and can even be harnessed in cloudy weather. The rate at which solar energy is intercepted by the Earth is about 10,000 times greater than the rate at which humankind consumes energy.
Solar technologies can deliver heat, cooling, natural lighting, electricity, and fuels for a host of applications. Solar technologies convert sunlight into electrical energy either through photovoltaic panels or through mirrors that concentrate solar radiation.
Although not all countries are equally endowed with solar energy, a significant contribution to the energy mix from direct solar energy is possible for every country.
The cost of manufacturing solar panels has plummeted dramatically in the last decade, making them not only affordable but often the cheapest form of electricity. Solar panels have a lifespan of roughly 30 years , and come in variety of shades depending on the type of material used in manufacturing.
WIND ENERGY
Wind energy harnesses the kinetic energy of moving air by using large wind turbines located on land (onshore) or in sea- or freshwater (offshore). Wind energy has been used for millennia, but onshore and offshore wind energy technologies have evolved over the last few years to maximize the electricity produced - with taller turbines and larger rotor diameters.
Though average wind speeds vary considerably by location, the world’s technical potential for wind energy exceeds global electricity production, and ample potential exists in most regions of the world to enable significant wind energy deployment.
Many parts of the world have strong wind speeds, but the best locations for generating wind power are sometimes remote ones. Offshore wind power offers t remendous potential .
GEOTHERMAL ENERGY
Geothermal energy utilizes the accessible thermal energy from the Earth’s interior. Heat is extracted from geothermal reservoirs using wells or other means.
Reservoirs that are naturally sufficiently hot and permeable are called hydrothermal reservoirs, whereas reservoirs that are sufficiently hot but that are improved with hydraulic stimulation are called enhanced geothermal systems.
Once at the surface, fluids of various temperatures can be used to generate electricity. The technology for electricity generation from hydrothermal reservoirs is mature and reliable, and has been operating for more than 100 years .
Hydropower harnesses the energy of water moving from higher to lower elevations. It can be generated from reservoirs and rivers. Reservoir hydropower plants rely on stored water in a reservoir, while run-of-river hydropower plants harness energy from the available flow of the river.
Hydropower reservoirs often have multiple uses - providing drinking water, water for irrigation, flood and drought control, navigation services, as well as energy supply.
Hydropower currently is the largest source of renewable energy in the electricity sector. It relies on generally stable rainfall patterns, and can be negatively impacted by climate-induced droughts or changes to ecosystems which impact rainfall patterns.
The infrastructure needed to create hydropower can also impact on ecosystems in adverse ways. For this reason, many consider small-scale hydro a more environmentally-friendly option , and especially suitable for communities in remote locations.
OCEAN ENERGY
Ocean energy derives from technologies that use the kinetic and thermal energy of seawater - waves or currents for instance - to produce electricity or heat.
Ocean energy systems are still at an early stage of development, with a number of prototype wave and tidal current devices being explored. The theoretical potential for ocean energy easily exceeds present human energy requirements.
Bioenergy is produced from a variety of organic materials, called biomass, such as wood, charcoal, dung and other manures for heat and power production, and agricultural crops for liquid biofuels. Most biomass is used in rural areas for cooking, lighting and space heating, generally by poorer populations in developing countries.
Modern biomass systems include dedicated crops or trees, residues from agriculture and forestry, and various organic waste streams.
Energy created by burning biomass creates greenhouse gas emissions, but at lower levels than burning fossil fuels like coal, oil or gas. However, bioenergy should only be used in limited applications, given potential negative environmental impacts related to large-scale increases in forest and bioenergy plantations, and resulting deforestation and land-use change.
For more information on renewable sources of energy, please check out the following websites:
International Renewable Energy Agency | Renewables
International Energy Agency | Renewables
Intergovernmental Panel on Climate Change | Renewable Sources of Energy
UN Environment Programme | Roadmap to a Carbon-Free Future
Sustainable Energy for All | Renewable Energy
Renewable energy – powering a safer future
What is renewable energy and why does it matter? Learn more about why the shift to renewables is our only hope for a brighter and safer world.
Five ways to jump-start the renewable energy transition now
UN Secretary-General outlines five critical actions the world needs to prioritize now to speed up the global shift to renewable energy.
Climate issues
Learn more about how climate change impacts are felt across different sectors and ecosystems, and why we must nurture rather than exploit nature’s resources to advance climate action.
Facts and figures
- What is climate change?
- Causes and effects
- Myth busters
Cutting emissions
- Explaining net zero
- High-level expert group on net zero
- Checklists for credibility of net-zero pledges
- Greenwashing
- What you can do
Clean energy
- Renewable energy – key to a safer future
- What is renewable energy
- Five ways to speed up the energy transition
- Why invest in renewable energy
- Clean energy stories
- A just transition
Adapting to climate change
- Climate adaptation
- Early warnings for all
- Youth voices
Financing climate action
- Finance and justice
- Loss and damage
- $100 billion commitment
- Why finance climate action
- Biodiversity
- Human Security
International cooperation
- What are Nationally Determined Contributions
- Acceleration Agenda
- Climate Ambition Summit
- Climate conferences (COPs)
- Youth Advisory Group
- Action initiatives
- Secretary-General’s speeches
- Press material
- Fact sheets
- Communications tips
IMAGES
COMMENTS
4 - 12. Coal, one of humankind's earliest fuel sources, is still used today to generate electricity. However, over time, there has been a shift in demand for cheaper and cleaner fuel options, such as the nonrenewable energy source of natural gas, and renewable options like solar power and wind energy. Each energy resource has its advantages ...
In contrast, renewable energy sources accounted for nearly 20 percent of global energy consumption at the beginning of the 21st century, largely from traditional uses of biomass such as wood for heating and cooking.By 2015 about 16 percent of the world's total electricity came from large hydroelectric power plants, whereas other types of renewable energy (such as solar, wind, and geothermal ...
A short essay on energy that discusses its importance, sources, problems and solutions. Learn about the fossil fuel crisis, the soft and hard paths of energy policy, and the concept of energy management and conservation.
Such as solar, wind, hydro, and geothermal power. In this Alternative Sources of Energy essay, the author argues that the Sun and wind have the potential to reduce our dependence on fossil fuels and lower carbon emissions. Read the paper to learn about the challenges, limitations, and benefits of implementing alternative energy sources.
10 Lines on Sources of Energy; 250 Words Essay on Sources of Energy Introduction. Energy is the driving force behind all natural and artificial phenomena. It is an indispensable resource in our daily lives, powering our homes, industries, and transportation. The sources of energy can be broadly classified into two categories: renewable and non ...
Energy is a fundamental requirement for modern civilization, and its generation comes from both renewable and nonrenewable resources. Examples of 10 Renewable Energy Sources. Solar Power: Energy from sunlight using solar panels. Wind Power: Energy from wind using turbines. Hydropower: Energy from the movement of water in rivers, dams, or tidal currents. ...
The wind, the sun, and Earth are sources of renewable energy . These energy sources naturally renew, or replenish themselves. Wind, sunlight, and the planet have energy that transforms in ways we can see and feel. We can see and feel evidence of the transfer of energy from the sun to Earth in the sunlight shining on the ground and the warmth we ...
Renewable energy sources include solar, wind, hydropower, geothermal energy, and biomass fuels. These energy sources are sustainable and generate fewer greenhouse gas emissions than fossil fuels. Renewable and nonrenewable energy sources. Clockwise from top left: a solar power station, a wind farm, a hydroelectric power plant, and a coal-fired ...
Hydropower is the world's biggest source of renewable energy by far, with China, Brazil, Canada, the U.S., and Russia the leading hydropower producers. While hydropower is theoretically a clean ...
Background Info. Vocabulary. In any discussion about climate change, renewable energy usually tops the list of changes the world can implement to stave off the worst effects of rising temperatures. That's because renewable energy sources, such as solar and wind, don't emit carbon dioxide and other greenhouse gases that contribute to global warming.
Renewable energy has numerous environmental benefits. Renewables lower reliance on foreign energy sources. Renewable energy leads to cleaner water and air. Renewable energy creates jobs. Renewable energy can cut down on waste. 1. Renewable energy won't run out. Renewable energy technologies use resources straight from the environment to ...
The below mentioned essay provides an anatomy of the Energy Resources of India. After reading this essay you will learn about: 1. Introduction to Energy Resources 2. Types of Energy Resource in India 3. The Energy Strategy 4. Energy Scenario. Essay # Introduction to Energy Resources in India: Energy resources are very much important in the context of economic development of the country. With ...
A qualitative research was employed by reviewing papers in the scope of the study. Even though, the complete lifecycle of renewable energy sources have no net emissions which will help limit future global greenhouse gas emissions. ... If these suggestions are implemented, the sustainability of renewable energy resources would be addressed as ...
Increasing the supply of renewable energy would allow us to replace carbon-intensive energy sources and significantly reduce US global warming emissions. For example, a 2009 UCS analysis found that a 25 percent by 2025 national renewable electricity standard would lower power plant CO2 emissions 277 million metric tons annually by 2025—the ...
Hydroelectric Power: Sustaining Our Energy Resources Essay. ... Chapter 7: Sustaining our energy resources, Chapter 8: Sustaining our atmosphere and climate. In Sustaining our planet (pp. 1-88). Zovio. Tkáč, Š. (2018). Hydro power plants, an overview of the current types and technology.
These resources are very expensive to be maintained, stored and transmitted. These resources are less expensive for local use and can easily be maintained. Examples- coal, natural gas, petroleum, and water power. Examples- solar, biomass, wind, biogas, and tidal, geothermal. In this article, you learned about natural resources, energy sources ...
1. Introduction. Nowadays, more sustainable energy technologies are required to replace conventional electricity generation resources such as fossil fuel, due to the worldwide demands especially in developed and developing countries [1].Fossil fuel-based energy sources are causing detrimental environmental issues such as global warming and climate change [2].
Also, the energy sources that people use does have floss and can cause a negative impact on the environment, and humans. The most important goal is reducing the overall use of our energy sources. The main two kinds of energy used in my daily living are electricity, fossil fuel, which is a type of biomass. The main fuel people use is fossil fuels.
Renewable resources include biomass energy (such as ethanol ), hydropower, geothermal power, wind energy, and solar energy. Biomass refers to organic material from plants or animals. This includes wood, sewage, and ethanol (which comes from corn or other plants). Biomass can be used as a source of energy because this organic material has ...
Introduction to Renewable Energy. In the quest for a sustainable and environmentally conscious future, adopting renewable energy has emerged as a pivotal solution to mitigate the challenges posed by traditional fossil fuels. Take, for instance, the remarkable growth of solar power in countries like Germany, where the "Energiewende" policy ...
500 Words Energy Conservation Essay. Energy conservation refers to the efforts made to reduce the consumption of energy. The energy on Earth is not in unlimited supply. Furthermore, energy can take plenty of time to regenerate. This certainly makes it essential to conserve energy.
But investments in renewable energy will pay off. The reduction of pollution and climate impacts alone could save the world up to $4.2 trillion per year by 2030. Moreover, efficient, reliable ...
Solar energy is the most abundant of all energy resources and can even be harnessed in cloudy weather. The rate at which solar energy is intercepted by the Earth is about 10,000 times greater than ...