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How did early photosynthetic organisms such as Cyanobacteria affect earths atmosphere?

How did early photosynthetic organisms such as Cyanobacteria affect earths atmosphere?
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How did early photosynthetic organisms such as Cyanobacteria affect earths atmosphere?

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User Luanped
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Answer: They replaced oxygen with carbon dioxide in the atmosphere.

Step-by-step explanation:

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User Tugra
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5 votes

Answer:

it helped move water around the earth

answered
User Benjamin Li
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