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en.wikipedia.org/wiki/Alternative_energy

Alternative energy is any energy source that is an alternative to fossil fuel. These alternatives are intended to address concerns about such fossil fuels, such as ...

www.conserve-energy-future.com/alternativeenergysources.php

Alternative Energy Sources: Alternative energy encompasses all those things that do not consume fossil fuel. They are widely available and environment ...

www.dictionary.com/browse/alternative-energy

Alternative energy definition, energy, as solar, wind, or nuclear energy, that can replace or supplement traditional fossil-fuel sources, as coal, oil, and natural gas  ...

study.com/academy/lesson/what-is-alternative-energy-definition-sources.html

And because of those downsides, the hunt has been on for alternatives. Alternative energy, by definition, is any source of energy that doesn't use fossil fuels.

www.universetoday.com/74599/what-is-alternative-energy

Dec 29, 2016 ... In recent years, alternative energy has been the subject of intense interest and debate. Thanks to the threat of Climate Change, and the fact that ...

www.merriam-webster.com/dictionary/alternative%20energy

Define alternative energy: usable power (such as heat or electricity) that comes from a renewable or green… — alternative energy in a sentence.

video.nationalgeographic.com/video/alternative-energy

A new wave of technologies is on the verge of producing energy that's clean, renewable, and most importantly, affordable.

alternativeenergy.procon.org

Can alternative energy effectively replace fossil fuels? Pros and cons in the debate over alternative energies.

en.oxforddictionaries.com/definition/alternative_energy

Definition of alternative energy - energy fuelled in ways that do not use up the earth's natural resources or otherwise harm the environment, especially by ...