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Q & A: Air - Mostly Nitrogen

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Most recent answer: 10/22/2007
What gas makes up the greatest percentage of the air we breathe?
- Sam
Rocaway, N.Y.
Sam -

Air is mostly made up of Nitrogen gas (about 75%). The other biggie is Oxygen gas (about 20%). The last little bit is a mixture of argon, water, carbon dioxide, ozone, and others. For more information on why this is, check out the answer to the question


(published on 10/22/2007)

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