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Coal is a combustible black or brownish black sedimentary rock composed mostly of carbon and hydrocarbons. Coal is a non-rewable energy source, it takes millons of years to be made. It is found underground, so people build coal mines to get at it. miners dig it out.

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What percentage of us electric is produced by coal?

More than 70% of US electricity is produced from coal.


What percent of the US electricity is produced by coal energy?

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Gasoline was produced in Germany during WW2 from coal, this was because they had no oil supplies in Germany and had failed to get to the Middle East.


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