WHAT IS COAL?
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Coal is a black or brownish-black mineral deposit formed as the result of the decay and compression of organic plant matter through geological action over millions of years.
Conditions such as the depth of burial, vegetation type, and length of burial change the properties of the coal. These factors affect the densities of carbon and the hardness and energy content of a given coal.
Conditions such as the depth of burial, vegetation type, and length of burial change the properties of the coal. These factors affect the densities of carbon and the hardness and energy content of a given coal.