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Chemistry, 11.12.2019 02:31 Arelysoqui91

The earth's atmosphere choose one: a. acquires its carbon dioxide from photosynthesis by green plants. b. became more oxygen-rich during the proterozoic, after the evolution of photosynthetic organisms in the archean. c. began as nitrogen and oxygen, left over from the solar nebula. d. gets warmer as its carbon dioxide concentration goes down.

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