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’.