haileybug0710p2ylci
haileybug0710p2ylci haileybug0710p2ylci
  • 06-02-2018
  • Biology
contestada

what was first responsible for changing the formerly poisonous atmosphere to an oxygen-rich atmosphere ss we have today

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druwshreves4
druwshreves4 druwshreves4
  • 06-02-2018
Plants and the first ice age releasing oxygen into the air
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