With the advent of plants on earth, an atmosphere with a relatively constant composition was formed.

With the advent of plants on earth, an atmosphere with a relatively constant composition was formed. What is the composition of this shell of the earth?

We have a relatively constant air composition due to the fact that plants are able to photosynthesize and now there are no natural cataclysms with high oxidation of substances, the release of various gases from the lithosphere, etc. The air contains the most nitrogen. It takes 78.09%. Oxygen ranks second. This is approximately 20.95%. Argon accounts for 0.93% and carbon dioxide 0.03%. Also, in addition to the above-mentioned gases, there are other gases in the atmosphere, which are quite small, but an increase in their concentration can negatively affect living organisms.