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2019
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During the carboniferous period, the oxygen level was ~35%. Now it is ~21%. There is less oxygen in atmosphere now. Where is that oxygen now?
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During the carboniferous period, the oxygen level was ~35%. Now it is ~21%. There is less oxygen in atmosphere now. Where is that oxygen now?
2359
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10
9
8
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5
4
3
2
1
0
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