Coal is mainly composed of —
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Coal is a black sedimentary rock that can be burned for fuel and used to generate electricity. ... It is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning).
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Coal is a black sedimentary rock that can be burned for fuel and used to generate electricity. ... It is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning)
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