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Biology 10 Online
OpenStudy (anonymous):

carbon dioxide is returned to atmosphere when?

OpenStudy (anonymous):

In the carbon cycle, humans will breathe out carbon dioxide. Carbon dioxide will return to the atmosphere by the burning of fossil fuels too.

OpenStudy (anonymous):

well if you meant the carbon cycle then: through either combustion (from factories, cars, etc), cellular respiration (from both plants and animals), and decomposers

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