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Excess, or additional carbon dioxide is added to the atmosphere only by the burning of fossil fuels (coal, oil and natural gas), and a very small amount from volcanic activity.

All other carbon dioxide moves in and out of the oceans, atmosphere and land as part of the normal carbon cycle, which includes the growing and dying of vegetation.

Fossil fuels release carbon dioxide that was taken out of the atmosphere (when the vegetation grew) 300 million years ago, so it is extra.

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Q: What ways have you added excess carbon dioxide to the atmosphere?
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How man contribute to the formation of the atmosphere?

Well I know that the atmosphere has carbon dioxide in it, and when we breath out we release carbon dioxide that could be then added to the atmosphere.


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