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3 April, 19:25

What was the major contributor of oxygen to earth's early atmosphere?

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  1. 3 April, 19:39
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    Photosynthesis I believe
  2. 3 April, 20:50
    0
    It's a bacteria that grew along all the ocean coast that took in carbon and through photosynthesis, turned it into oxygen, the process took about a billion years.
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