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Biology, 21.11.2019 14:31 kendramiller3965

By how much did carbon dioxide levels increase from 1980 to 2000?
a.22 ppm
b.32 ppm
c.45 ppm
d.51 ppm

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Answers: 3

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By how much did carbon dioxide levels increase from 1980 to 2000?
a.22 ppm
b.32 ppm
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