alternative energy sources essay

Alternative Sources of Energy Essay

When will we switch to renewable sources of energy? 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. A particular part is dedicated to the importance of government policies in promoting the development and use of alternative energy sources. Overall, the essay on alternative sources of energy presents a comprehensive overview of the current state of renewable energy and its potential for shaping our future.

Introduction

Solar power, course of action, works cited.

The world has been overly relying on oil as a source of energy to fuel most of its operations. It is important to note that as much as 80% of the world’s energy comes from fossil fuel. Unfortunately, the fossil deposits we have in the world cannot last forever. They will be depleted one day and cause a lot of problems in the world.

Therefore, efforts should be made to ensure that other sources of energy are found so that when fossil fuel gets depleted the world does not come to a halt. In this regard, many people especially in the U.S. have been concerned with the steps that the government is taking towards encouraging development of other sources of energy.

Consequently, the government has been urged to reduce restrictions impeding the development of renewable sources of energy and increase funding of the same. However, to address this issue, it is better to understand some of the sources renewable energy.

Among the proposed sources of power to be used is solar energy. Solar energy is a renewable source of energy because the sun has been there and can only be absent for a very short period of time. On the same note, harnessing of solar energy is noise proof which means that noise pollution is avoided when using solar power (Boxwell 58).

Similarly, solar power is environmental friendly because it does not produce any form of pollution. In addition, equipments used in the production of solar power are cheap to maintain thus the long run cost of production is low. Moreover, it is easy and cheap to install appliances of solar power.

Similarly, the electricity produced from solar energy can be used to power virtually every thing that uses power (Boxwell 59). It is also important to note that the production of solar power does not lead to environmental degradation like digging up the ground or deforestation.

However, solar power has its disadvantages. To begin with, some people have argued that the initial cost of installing solar power harnessing equipment is very high. Additionally, harnessing of solar power is affected by whether and cannot be done during cloudy or rainy days and at night. Therefore, another source of energy is needed to act as a back up (Boxwell 60).

On the other hand, wind energy is also another source of energy that can replace fossil fuel. Wind energy does not emit green house gases which are dangerous to the environment. Furthermore, no fossil fuels are burnt to produce wind energy thus it does not pollute the environment (Miller and Scott 407). Besides, extraction of wind energy is more efficient given the advancement in technology.

The turbines used to produce wind power only occupy little space at the base leaving room for other activities to be done on the ground. Moreover, wind energy is highly applicable in under developed parts of a country and can add to the tax base of the area.

In addition, renewable sources of energy, wind being among them, require minimal subsidies to maintain. On the same note, the cost of producing wind power is constant and therefore prices for wind power do not fluctuate. Most importantly, wind is free and thus cost of producing wind power is low in the long run (Miller and Scott 407).

It is crucial, however, to highlight that wind power has its share of disadvantages. Firstly, wind power depends on the flow of wind. On the days when the weather is calm wind power might not be generated. On the same note, the initial cost of producing wind power is quite high and individuals may not afford it (Miller and Scott 408). Lastly, power produced by the turbines is insufficient compared to power produced by fossil fuels.

Despite the disadvantages of wind and solar power, their advantages are definitely more. They are renewable and therefore they will never get depleted. Sooner or later the government will have to find alternative ways of producing power.

Consequently, it is high time that the government increased its financial support in the production of the two types of power (Miller and Scott 407). Reduction of restrictions is necessary but it might not be sufficient given the heavy initial cost. Similarly, renewable sources of energy, especially wind and solar power, are both economically and environmentally viable in the long run hence the need to invest in them.

The fact that the country currently satisfies most of its energy requirements should not blind our eyes. We will need to think of how we will operate in future. The fossil fuel that forms the giant part of energy source will definitely be exhausted with time.

It will be a great disservice to the future generations if we do not find sustainable energy sources. Consequently, the government has no option but to encourage the production wind and solar energy.

Boxwell, Michael. Solar Electricity Handbook: A simple. Practical Guide to Solar Energy-Designing and Installing Photovoltaic Solar Electric Systems . Warwickshire: Greenstream Publishing, 2010. Print.

Miller, Tyler G. and Scott Spoolman. Living in the Environment: Principles, Connections, and Solutions . Stanford: Cengage Learning, 2011. Print.

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Essay on Alternative Sources of Energy

Students are often asked to write an essay on Alternative 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 Alternative Sources of Energy

Introduction.

Alternative sources of energy are the future of our planet. They are clean, renewable, and help in reducing the carbon footprint.

Types of Alternative Energy

There are several types of alternative energy. Solar power uses the sun’s energy, wind power harnesses wind, and hydroelectric power uses water.

These energy sources are renewable, meaning they won’t run out like fossil fuels. They also produce less pollution, helping to protect our environment.

Embracing alternative energy is crucial for our planet’s future. It is a sustainable and environmentally friendly solution to our energy needs.

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250 Words Essay on Alternative Sources of Energy

The depletion of conventional energy sources and the environmental implications of their use necessitate a shift towards alternative, sustainable energy sources. These alternatives, such as solar, wind, and geothermal energy, offer the potential to reduce our reliance on fossil fuels and diminish our carbon footprint.

Solar Energy

Solar energy is a viable and increasingly popular alternative. Harnessing the power of the sun through photovoltaic cells, solar energy offers a renewable, abundant, and virtually inexhaustible source of power. The decreasing costs of solar panels and the potential for energy storage make it a compelling option.

Wind Energy

Wind energy, another significant alternative source, utilizes the kinetic energy of wind to generate electricity. Wind turbines, both onshore and offshore, present a clean, renewable energy source. However, their efficiency is contingent on wind speed and consistency, posing a challenge for its widespread adoption.

Geothermal Energy

Geothermal energy, derived from the Earth’s natural heat, is another promising alternative. It is reliable, available round-the-clock, and has a minimal environmental impact. However, it is location-specific and requires significant initial investment.

The transition to alternative energy sources is not without challenges, including technological limitations, initial costs, and geographical constraints. However, the long-term benefits in terms of sustainability, environmental protection, and energy security make it a necessary shift. Embracing these alternatives will pave the way for a sustainable and energy-efficient future.

500 Words Essay on Alternative Sources of Energy

The global energy landscape is undergoing a significant transformation, driven by a recognition of the need for sustainable, renewable, and less harmful energy sources. The increasing environmental concerns, coupled with the finite nature of fossil fuels, have necessitated the exploration and utilization of alternative sources of energy. These alternatives, including solar, wind, hydroelectric, tidal, geothermal, and biomass energy, present a promising route towards a sustainable and carbon-neutral future.

The Potential of Solar and Wind Energy

Solar and wind energy are the most widely recognized forms of renewable energy. Solar energy harnesses the power of the sun, converting sunlight into electricity. With the sun as an inexhaustible energy source, solar power presents a sustainable solution to energy needs. Moreover, advancements in photovoltaic technology have significantly increased solar power’s efficiency and affordability.

Wind energy, on the other hand, leverages the kinetic energy of wind to generate electricity. Wind turbines, strategically placed in areas with strong wind currents, can produce substantial amounts of energy. Wind power, like solar energy, is clean and renewable, with the potential to significantly reduce our reliance on fossil fuels.

Hydroelectric, Tidal, and Geothermal Energy

Hydroelectric energy, generated by harnessing the power of flowing or falling water, is another viable alternative. The construction of dams and hydroelectric power plants enables the production of large-scale electricity, contributing significantly to the energy mix of many countries.

Tidal energy, although less utilized, holds immense potential. It involves capturing the energy produced by ocean tides and waves. With the predictable and consistent nature of tides, tidal energy can provide a steady and reliable source of electricity.

Geothermal energy, derived from the Earth’s internal heat, is another promising alternative. Geothermal power plants use the heat from deep inside the Earth to generate steam, which drives turbines to produce electricity.

Biomass Energy

Biomass energy refers to the energy obtained from organic material, including plant and animal waste. The process of burning or converting this biomass into usable energy forms is a renewable process, as new organic material is continually produced. Biomass energy not only provides a solution for waste management but also contributes to a diversified and sustainable energy portfolio.

In conclusion, the quest for sustainable and environmentally friendly energy solutions has led to the exploration and development of various alternative energy sources. These alternatives, each with their unique advantages and challenges, play a crucial role in the gradual transition from fossil fuels. As technology advances and our understanding of these energy sources deepens, the potential for a sustainable and carbon-neutral energy future becomes increasingly achievable.

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Home — Essay Samples — Environment — Environmental Sustainability — Alternative Energy

Essays on Alternative Energy

Dive into the dynamic world of alternative energy solutions with our extensive collection of essays. As the globe grapples with the pressing need to transition from fossil fuels to more sustainable energy sources, our essays explore the innovations, challenges, and impacts associated with alternative energy.

Diverse Alternative Energy Sources

From solar and wind to geothermal and bioenergy, our alternative energy essays cover a broad spectrum of renewable resources. Each piece provides insightful analysis on the potential and limitations of these energy sources, offering a comprehensive overview of the future energy landscape.

The Environmental and Economic Impacts of Alternative Energy

Understand the crucial role alternative energy plays in combating climate change and promoting global sustainability. Our essays delve into the environmental benefits, such as reduced carbon emissions and conservation of natural resources, alongside the economic implications, including job creation and energy security.

Technological Innovations and Policy Frameworks

Discover the latest advancements in alternative energy technology and the policy frameworks that support their adoption. Through detailed essays, learn about the strides being made in energy efficiency, storage solutions, and smart grid technology, as well as the legislative measures driving renewable energy deployment.

Engaging the Global Community in Alternative Energy Discourse

Our collection aims to engage readers in the vital discourse on alternative energy, encouraging a shift in perception and action towards renewable energy sources. By highlighting both the successes and obstacles in the field, these essays inspire informed discussions and proactive involvement in the global transition to alternative energy.

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Renewable Energy

Renewable energy comes from sources that will not be used up in our lifetimes, such as the sun and wind.

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Wind Turbines in a Sheep Pasture

Wind turbines use the power of wind to generate energy. This is just one source of renewable energy.

Photograph by Jesus Keller/ Shutterstock

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 feel when sunlight shines on our skin. We can see and feel evidence of the transfer of energy in wind’s ability to pull kites higher into the sky and shake the leaves on trees. We can see and feel evidence of the transfer of energy in the geothermal energy of steam vents and geysers .

People have created different ways to capture the energy from these renewable sources.

Solar Energy

Solar energy can be captured “actively” or “passively.”

Active solar energy uses special technology to capture the sun’s rays. The two main types of equipment are photovoltaic cells (also called PV cells or solar cells) and mirrors that focus sunlight in a specific spot. These active solar technologies use sunlight to generate electricity , which we use to power lights, heating systems, computers, and televisions.

Passive solar energy does not use any equipment. Instead, it gets energy from the way sunlight naturally changes throughout the day. For example, people can build houses so their windows face the path of the sun. This means the house will get more heat from the sun. It will take less energy from other sources to heat the house.

Other examples of passive solar technology are green roofs , cool roofs, and radiant barriers . Green roofs are completely covered with plants. Plants can get rid of pollutants in rainwater and air. They help make the local environment cleaner.

Cool roofs are painted white to better reflect sunlight. Radiant barriers are made of a reflective covering, such as aluminum. They both reflect the sun’s heat instead of absorbing it. All these types of roofs help lower the amount of energy needed to cool the building.

Advantages and Disadvantages There are many advantages to using solar energy. PV cells last for a long time, about 20 years.

However, there are reasons why solar power cannot be used as the only power source in a community. It can be expensive to install PV cells or build a building using passive solar technology.

Sunshine can also be hard to predict. It can be blocked by clouds, and the sun doesn’t shine at night. Different parts of Earth receive different amounts of sunlight based on location, the time of year, and the time of day.

Wind Energy

People have been harnessing the wind’s energy for a long, long time. Five-thousand years ago, ancient Egyptians made boats powered by the wind. In 200 B.C.E., people used windmills to grind grain in the Middle East and pump water in China.

Today, we capture the wind’s energy with wind turbines . A turbine is similar to a windmill; it has a very tall tower with two or three propeller-like blades at the top. These blades are turned by the wind. The blades turn a generator (located inside the tower), which creates electricity.

Groups of wind turbines are known as wind farms . Wind farms can be found near farmland, in narrow mountain passes, and even in the ocean, where there are steadier and stronger winds. Wind turbines anchored in the ocean are called “ offshore wind farms.”

Wind farms create electricity for nearby homes, schools, and other buildings.

Advantages and Disadvantages Wind energy can be very efficient . In places like the Midwest in the United States and along coasts, steady winds can provide cheap, reliable electricity.

Another great advantage of wind power is that it is a “clean” form of energy. Wind turbines do not burn fuel or emit any pollutants into the air.

Wind is not always a steady source of energy, however. Wind speed changes constantly, depending on the time of day, weather , and geographic location. Currently, it cannot be used to provide electricity for all our power needs.

Wind turbines can also be dangerous for bats and birds. These animals cannot always judge how fast the blades are moving and crash into them.

Geothermal Energy

Deep beneath the surface is Earth’s core . The center of Earth is extremely hot—thought to be over 6,000 °C (about 10,800 °F). The heat is constantly moving toward the surface.

We can see some of Earth’s heat when it bubbles to the surface. Geothermal energy can melt underground rocks into magma and cause the magma to bubble to the surface as lava . Geothermal energy can also heat underground sources of water and force it to spew out from the surface. This stream of water is called a geyser.

However, most of Earth’s heat stays underground and makes its way out very, very slowly.

We can access underground geothermal heat in different ways. One way of using geothermal energy is with “geothermal heat pumps.” A pipe of water loops between a building and holes dug deep underground. The water is warmed by the geothermal energy underground and brings the warmth aboveground to the building. Geothermal heat pumps can be used to heat houses, sidewalks, and even parking lots.

Another way to use geothermal energy is with steam. In some areas of the world, there is underground steam that naturally rises to the surface. The steam can be piped straight to a power plant. However, in other parts of the world, the ground is dry. Water must be injected underground to create steam. When the steam comes to the surface, it is used to turn a generator and create electricity.

In Iceland, there are large reservoirs of underground water. Almost 90 percent of people in Iceland use geothermal as an energy source to heat their homes and businesses.

Advantages and Disadvantages An advantage of geothermal energy is that it is clean. It does not require any fuel or emit any harmful pollutants into the air.

Geothermal energy is only avaiable in certain parts of the world. Another disadvantage of using geothermal energy is that in areas of the world where there is only dry heat underground, large quantities of freshwater are used to make steam. There may not be a lot of freshwater. People need water for drinking, cooking, and bathing.

Biomass Energy

Biomass is any material that comes from plants or microorganisms that were recently living. Plants create energy from the sun through photosynthesis . This energy is stored in the plants even after they die.

Trees, branches, scraps of bark, and recycled paper are common sources of biomass energy. Manure, garbage, and crops , such as corn, soy, and sugar cane, can also be used as biomass feedstocks .

We get energy from biomass by burning it. Wood chips, manure, and garbage are dried out and compressed into squares called “briquettes.” These briquettes are so dry that they do not absorb water. They can be stored and burned to create heat or generate electricity.

Biomass can also be converted into biofuel . Biofuels are mixed with regular gasoline and can be used to power cars and trucks. Biofuels release less harmful pollutants than pure gasoline.

Advantages and Disadvantages A major advantage of biomass is that it can be stored and then used when it is needed.

Growing crops for biofuels, however, requires large amounts of land and pesticides . Land could be used for food instead of biofuels. Some pesticides could pollute the air and water.

Biomass energy can also be a nonrenewable energy source. Biomass energy relies on biomass feedstocks—plants that are processed and burned to create electricity. Biomass feedstocks can include crops, such as corn or soy, as well as wood. If people do not replant biomass feedstocks as fast as they use them, biomass energy becomes a non-renewable energy source.

Hydroelectric Energy

Hydroelectric energy is made by flowing water. Most hydroelectric power plants are located on large dams , which control the flow of a river.

Dams block the river and create an artificial lake, or reservoir. A controlled amount of water is forced through tunnels in the dam. As water flows through the tunnels, it turns huge turbines and generates electricity.

Advantages and Disadvantages Hydroelectric energy is fairly inexpensive to harness. Dams do not need to be complex, and the resources to build them are not difficult to obtain. Rivers flow all over the world, so the energy source is available to millions of people.

Hydroelectric energy is also fairly reliable. Engineers control the flow of water through the dam, so the flow does not depend on the weather (the way solar and wind energies do).

However, hydroelectric power plants are damaging to the environment. When a river is dammed, it creates a large lake behind the dam. This lake (sometimes called a reservoir) drowns the original river habitat deep underwater. Sometimes, people build dams that can drown entire towns underwater. The people who live in the town or village must move to a new area.

Hydroelectric power plants don’t work for a very long time: Some can only supply power for 20 or 30 years. Silt , or dirt from a riverbed, builds up behind the dam and slows the flow of water.

Other Renewable Energy Sources

Scientists and engineers are constantly working to harness other renewable energy sources. Three of the most promising are tidal energy , wave energy , and algal (or algae) fuel.

Tidal energy harnesses the power of ocean tides to generate electricity. Some tidal energy projects use the moving tides to turn the blades of a turbine. Other projects use small dams to continually fill reservoirs at high tide and slowly release the water (and turn turbines) at low tide.

Wave energy harnesses waves from the ocean, lakes, or rivers. Some wave energy projects use the same equipment that tidal energy projects do—dams and standing turbines. Other wave energy projects float directly on waves. The water’s constant movement over and through these floating pieces of equipment turns turbines and creates electricity.

Algal fuel is a type of biomass energy that uses the unique chemicals in seaweed to create a clean and renewable biofuel. Algal fuel does not need the acres of cropland that other biofuel feedstocks do.

Renewable Nations

These nations (or groups of nations) produce the most energy using renewable resources. Many of them are also the leading producers of nonrenewable energy: China, European Union, United States, Brazil, and Canada

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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

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