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The short term cycling<span> of </span>carbon<span> begins with </span>carbon<span> dioxide and the process of photosynthesis. Our atmosphere is mostly made of nitrogen and oxygen, but there is a small amount of </span>carbon<span> dioxide in the air too.
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Answer:
Precambrian: 4055 million years; 88% Paleozoic: 300 million years; 7% Mesozoic: 179 million years; 4% Cenozoic: 66 million years; 1%Explanation:
