About 99 percent of the earth's atmospheric air is made up of
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78%percent of the earth's atmosphere is made up of nitrogen,21%oxygen,0.9%argon and 0.03% carbon dioxide and
traces of other elements
traces of other elements
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By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases.
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