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02-01-2019
Physics

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The Chemical make-up of Earth's atmosphere during the cretaceous period

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Shua123 Shua123

02-01-2019

There are indications that the cretaceous atmosphere may have been much richer in oxygen. Today, Earth's atmosphere contains about 77% nitrogen, 21% oxygen, 1% water vapor, 0.9% argon, and 0.03% carbon dioxide, with traces of about a dozen other gases.

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