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When was the last time that the carbon molecule in the CO2 was in the atmosphere?
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When was the last time that the carbon molecule in the CO2 was in the atmosphere?

User Tupy
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Answer:

The last time levels of atmospheric carbon dioxide were this high came during the Pliocene Epoch, which extended from about 5.3 million to 2.6 million years ago.

Step-by-step explanation:

User Kemal Erdogan
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