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Do human activities or nature release a greater amount of carbon dioxide into the earth's atmosphere?

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Human activities release about 37 billion metric tons of CO2 per year, and nature emits about 770 billion metric tons per year. Thus, nature releases about 20 times more than humans. However, natural processes also absorb the equivalent of all natural emissions plus about 57% of man-made emissions.

DocumentationCarbon Dioxide Sources

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