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How did an oxygen-rich atmosphere develop from a carbon dioxide-rich atmosphere? multiple choice through photosynthesis by cyanobacteria through asteroid impacts through volcanic eruptions
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How did an oxygen-rich atmosphere develop from a carbon dioxide-rich atmosphere? multiple choice through photosynthesis by cyanobacteria through asteroid impacts through volcanic eruptions

User Lorenzo Fiamingo
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through photosynthesis by cyanobacteria and plants containing chlorophyll pigment
this is the only natural process which releases the life supporting gas oxygen into the atmosphere
User Dvoyni
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