Description of the Energy Source of Coal

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Tip 1 - Description of Coal Energy | eHow

Published: 9 years, 2 month(s) ago | Submitted by Tom Yeung | permalink

Coal is a black or brownish-black solid combustible substance. It is widely used as a natural fuel. It took millions of years to form coal by the partial decomposition of vegetable matter without free access of air and under the influence of moisture and often increased pressure and temperature. Coal is found in layers within the earth's crust....

For further reading: http://www.ehow.com/about_6452752_description-coal-energy.html ^[1]

Tip 2 - What is coal? - Origin Energy

Published: 9 years, 2 month(s) ago | Submitted by Pheoxs | permalink

Coal is used to make a significant proportion of the world's electricity. Find out the benefits of coal and how it's used to make electricity.
Tags: Coal, Generation, draft, quarterly, Electricity, Fossil fuels, Fuels

For further reading: http://www.originenergy.com.au/blog/about-energy/what-is-coal.html ^[2]