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21 August, 15:08

What was the original atmosphere made of primarily? What is is made primarily of now?

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  1. 21 August, 16:33
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    Answer: Earth's atmosphere is 78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide with very small percentages of other elements.

    Explanation:

    It included hydrogen sulfide, methane, and ten to 200 times as much carbon dioxide as today's atmosphere.
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