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9. The concentration of carbon dioxide in the atmosphere has been increasing since the industrial revolution. In 2001, the co

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ppme 1umol mol air 369 Mmold Con lr wol S, 369 Maa 5atmasphee 52x1018K52x10 Molanr maoa .2x10 29 No.81 wmols atmosplua 1-79x

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