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Scientists have inferred that Earth's original atmosphere was formed by the
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Scientists have inferred that Earth's original atmosphere was formed by the

User Warren Benedetto
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Answer:hydrogen sulfide, methane

Step-by-step explanation:

As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes. It included hydrogen sulfide, methane, and ten to 200 times as much carbon dioxide as today's atmosphere.

User Christoph Dittberner
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