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What gases are in the atmosphere?

Updated: 9/11/2023
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Nitrogen and oxygen are the two most important gases. They comprise about 78 and 21 % of the air respectively. There are also variable amounts of water vapour, about 0.93% argon, 0.04% carbon dioxide and trace amounts of other gases, both natural and polluting.

nitrogen - 78.084%

oxygen - 20.946%

argon - 0.934%

water vapour - 0.4%

carbon dioxide - 0.04%

neon - 0.01818%

helium - 0.000524%

methane - 0.000179%

krypton - 0.000114%

hydrogen - 0.000055%

nitrous oxide - 0.00003%

carbon monoxide - 0.00001%

xenon - 0.000009%

ozone - 0.000007%

nitrogen dioxide - 0.000002%

iodine - 0.000001%

ammonia - trace
There are several gases present in the atmosphere

  • Nitrogen-78%
  • Oxygen-21%
  • Carbon dioxide-0.03%
  • Other gases- traces
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