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What created oxygen in the early atmosphere Photosynthetic bacteria Asteroids hitting the earth plankton Volcanic eruptions forests

What created oxygen in the early atmosphere Photosynthetic bacteria Asteroids hitting the earth plankton Volcanic eruptions forests
asked 106k views
4 votes
What created oxygen in the early atmosphere

Photosynthetic bacteria
Asteroids hitting the earth
plankton
Volcanic eruptions
forests

asked
User Beygi
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7.6k points

1 Answer

4 votes
Oxygen was created by the first signs of photosynthesis, done by plants and algae. =)
answered
User Merhawi Fissehaye
by
8.0k points
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