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What is a coal ​

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What is a coal ​

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Quinn 2 years 2021-07-08T04:55:08+00:00 2 Answers 0 views 0

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  1. Kinsley
    0
    2021-07-08T04:56:39+00:00
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    Answer:

    Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. Coal is classified as a nonrenewable energy source because it takes millions of years to form. Coal contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests.

  2. Eliza
    0
    2021-07-08T04:56:44+00:00
    Reply

    Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. Coal is classified as a nonrenewable energy source because it takes millions of years to form. Coal contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests.

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