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If carbon dioxide goes up to roughly 400 parts per million, that is warm enough to melt chunks of land ice. How could this directly affect human health?.

User Alberto Chiesa
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Answer:

During 9th of May, 2013, CO 2 levels in the air officially reached the level of 400 parts per million (ppmm). This is the first time in human history that this milestone has been passed.

Step-by-step explanation:

User Helb
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