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features lessons on coal, oil, and natural gas. Learn how coal is formed and used, and about technologies for cleaning up coal. Find out how oil is squeezed out of the earth and how natural gas is extracted from the ground and sea. (Department of Energy)
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Natural gas is made up mainly of a chemical called methane, a simple, compound that has a carbon atom surrounded by four hydrogen atoms. Methane is highly flammable and burns almost completely. There is no ash and very little air pollution. |
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Inside an oil drop |
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