Question

CO2 is generally heavier than O2 and nitrogen ? why does it not lower layer of atmosphere?

Answer 1

because of its less amount

Answer 2

Carbon dioxide is generally heavier than oxygen and nitrogen. ... Though carbon dioxide is heavier than air, but it has a tendency to mix with other gases of air and since the rest gases are found at higher altitude so the carbon dioxide could not be able to be in the lower layer of atmospheric air.