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lbvjy [14]
3 years ago
14

Recent evidence from polar ice core analysis shows that, until now, carbon dioxide levels have never exceeded ________ ppm in th

e last several hundred thousand years.
Biology
1 answer:
kramer3 years ago
6 0

<span>Scientists have been doing several experimentation and discovery of the changes of the ice on the pole. Recent evidence from polar ice core analysis shows that, until now, carbon dioxide levels have never exceeded 300 ppm in the last several hundred thousand years.</span>

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