[alexander_busek]

Also, the air we breathe is roughly 21% Oxygen and 78% Nitrogen. The remaining 1% contains the CO2 mentioned above.

The remaining 1% consists chiefly of the noble gas Argon - and a tiny portion of carbon dioxide (about 400 ppm).

Regards,

[Parmy]

I meant that the 1% left contains the CO2 in the atmosphere, plus being technical all the other gases listed on the periodic chart.

Regards, as well