Carbon dioxide constitutes about ________ % by volume in air.

Carbon dioxide constitutes about 0.04 % by volume in the air.

The abundance of Carbon in the atmosphere

  • Carbon dioxide is a colourless and non-flammable gas at normal temperature and pressure.
  • Although much less abundant than nitrogen and oxygen in Earth’s atmosphere.
  • A carbon dioxide (CO2) molecule is made up of one carbon atom and two oxygen atoms.
  • Carbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere.
  • Carbon dioxide is the fourth most abundant component of dry air.
  • Carbon dioxide levels in our atmosphere have risen about 40% since the onset of human industrialization and are expected to play a troubling role in raising global temperature.
  • Carbon dioxide is the most abundant gas in the atmospheres of Mars and Venus. Solid, frozen carbon dioxide is called ‘dry ice’.

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