Question

what is the importance of carbon cycle in four points ​

Answer 1

Carbon is exchanged, or "cycled" among Earth's oceans, atmosphere, ecosystem, and geosphere. All living organisms are built of carbon compounds. It is the fundamental building block of life and an important component of many chemical processes.

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Answer 2

First ,carbon forms structure of all life on planet, making up ~50% of the dry weight of living things.
Second, the cycling of carbon approximates the flows of energy around the Earth, the Metabolism of natural, human and industrial system.
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