rocky101 rocky101

03-10-2014
Health

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this gas makes up close to one fourth of the air surrounding earth

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03-10-2014

Welllll, it's not really that close to one fourth.

One fourth is 25%.

The closest one is oxygen, which comprises about 18% of the air.

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jonericfogg jonericfogg

04-10-2014

Oxygen makes up about 21% of the earth's atmosphere and 78% is nitrogen with 1% other gases

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