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What is Earths atmosphere composed of compared to Mars?

April 26, 2017Astronomy atmosphere composed earth mars Mathematics

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What is Earths atmosphere composed of compared to Mars?

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Earth – 75% nitrogen gas (N2), 23% oxygen gas (O2), 1% water vapor (H2O), 1% argon (Ar), 0.1% everything else (C02, Ne, He, CH4, etc) Mars – Carbon dioxide, which accounts for 96% of the total. The rest of the atmosphere is nitrogen, and argon, with very small amounts of oxygen.