Air
Revision as of 08:46, 10 December 2019 by Red kangaroo (talk | contribs)
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Air is a layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly 78% nitrogen, 21% oxygen, 0.97% argon, 0.04% carbon dioxide, and trace amounts of other gases, in addition to water vapor. It is also what keeps us alive.
