Occurrence and use of CO2

CO2 in the air we breathe

Fresh air has a concentration of around 400 ppm of CO2 (measured in 2015 - highest value for approx. 15-20 million years).
The concentration of the gas depends on the 

  • time of day and season of the year
  • region

CO2 occurrence in the earth's various layers

  • atmosphere
  • hydrosphere (water)
  • lithosphere (earth's crust and mantle)
  • biosphere (living environment 60 km above and 5 km below the earth's surface)

The visualization of CO2

The concentration in the air is normally given in

  • ppm (parts per million)
  • vol.% (1,000 ppm corresponds to 0.1%)

The importance of air quality for humans

The CO2 concentration in indoor areas is deemed to be an essential indicator of suitable air quality.

Carbon dioxide is a gas that is poisonous for humans and, depending on the concentration in the air, affects their performance, their well-being and their ability to concentrate.

Even when there is a CO2 concentration as low as 1,000 ppm, most people feel the air is not good and the above-mentioned disorders occur.


The use of CO2

Do you like drinking sparkling mineral water?
Then you may be interested to know that CO2 does not just represent a threat. It is widely used in food, technical and other sectors.