1. Coal ad petroleum are the major sources of energy traditionally.

    Coal ad petroleum are the major sources of energy traditionally.

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  2. Fossil fuels are formed from the remains of plants and animals that are buried under the earth for a period of million of years are called fossil fuels.

    Fossil fuels are formed from the remains of plants and animals that are buried under the earth for a period of million of years are called fossil fuels.

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