Assuming the carbon cycle is a closed system, which of the following statements is true?
A.Mass and energy are conserved in the carbon cycle.
B.As population sizes increase, more carbon is produced.
C.The Sun absorbs energy from the carbon cycle.
D.When all the fossil fuels are used up, there will be no more carbon.
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D.When all the fossil fuels are used up, there will be no more carbon
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Answer:
D
Explanation:
the carbon is chemical backbone of all life on earth.
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