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Alternative energy is energy sources other than fossil fuels, including renewable sources and nuclear energy.
A clean energy revolution is taking place across America. Examine the clean energy sources at this site.
Coal is a form of rock that is usually black and hard, or black-brown.
Coal is the most abundant fossil fuel resource in the United States.
Read the story of how humans began using coal.
Your guide to understanding energy.
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Login to Britannica Online to read about this topic.
Read the story of how humans began using gas.
Natural gas - like oil and coal - is a fossil fuel.
Explores why nonrenewable resources cannot be replaced. Login to Discovery Education and watch this short video.
Non-renewable energy is a source of energy that will eventually run out.
Energy comes from many sources, and to describe these sources we use two terms: renewable and non-renewable.
Crude oil is a dark liquid. It is found in reservoirs deep under the ground.
Read the story of how humans began using oil.
A renewable energy source means energy that is sustainable - something that can't run out, or is endless, like the sun.
Renewable energy is made from resources that nature will replace, like wind, water and sunshine.
Teaches that fossil fuels are made from the preserved remains of ancient plants and animals, and showcases the formation of fossil fuels. Login to Discovery Education and watch this short video.
Updated 2/19/2025
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