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What is the atmosphere made of?
asked Jan 13, 2011 by triuser (1,754 points)

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The atmosphere is made up of various gases that act as a protective shield for the Earth. Earth's atmosphere is 78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide.
answered Jan 13, 2011 by trianswer (22,754 points)

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