Question 2 of 10 How did oxygen first enter Earth's atmosphere?

JMelnik asked Aug 1, 2023

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15 votes

Question 2 of 10
How did oxygen first enter Earth's atmosphere?

JMelnik asked Aug 1, 2023

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9 votes

Answer: It wouild be biological proceses

Ziyu answered Aug 7, 2023

by Ziyu

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