Geography, 16.12.2021 23:50 sidneydominguez2323
Evidence suggests that originally the Earth's atmosphere contained a large amount of carbon dioxide and almost no oxygen. Our atmosphere is different today: it contains a large amount of oxygen, which is good, since we need it to breathe. What caused this atmospheric change? A) Global warming B) A meteor impact C) Photosynthetic organisms like cyanobacteria taking in carbon dioxide and releasing oxygen. D) Photosynthetic organisms like cyanobacteria taking in oxygen and releasing carbon dioxide.
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