What trend do you notice about the relative amount of oxygen in the atmosphere?

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asked Aug 11, 2022 180k views

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Gene Vincent · Answer 1 · 2022-08-17T06:18:53+0000

Answer:

The proportion of oxygen went up because of photosynthesis by plants. The proportion of carbon dioxide went down because: it was locked up in sedimentary rocks (such as limestone) and in fossil fuels. it was absorbed by plants for photosynthesis.

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What trend do you notice about the relative amount of oxygen in the atmosphere?

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