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Starting billions of years ago, algae lowered the. atmosphere. levels in the A. carbon dioxide D. oxygen C. ozone B. methane​

Starting billions of years ago, algae lowered the. atmosphere. levels in the A. carbon dioxide D. oxygen C. ozone B. methane​
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4 votes
Starting billions of years ago, algae lowered the. atmosphere. levels in the A. carbon dioxide D. oxygen C. ozone B. methane​

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User Schmurfy
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1 Answer

4 votes

Step-by-step explanation:

ozone probably, I think

answered
User Maxime G
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