vdaisy098 vdaisy098
  • 12-03-2019
  • Physics
contestada

How did Earth's atmosphere become oxygen-rich?

Respuesta :

boo3971
boo3971 boo3971
  • 12-03-2019

Trees is the answer

Answer Link
MoriSan
MoriSan MoriSan
  • 14-05-2021

Answer:

It's biological activity.

Answer Link

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