Chemistry - Clean air

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The contents of the air is:

  • Nitrogen - 78%
  • Oxygen - 21%
  • Carbon dioxide - 0.032%
  • Argon - 0.9%

The level of carbon dioxide in the atmosphere is maintained by several processes, including photosynthesis, respiration and combustion.

Some of the common air pollutants are:

  • Carbon monoxide - Incomplete combustion of the fuel in car engines
  • Oxides of nitrogen, NOx -


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