Yes.
A lot of substances are not air pollutant. You must specify which kind of substance do you refer as a probable air pollutant.
pollution
primary pollution
yes, when it is released in large amounts than the normal natural percentage in air
No, n2 (nitrogen gas) is not considered an air pollutant.
Yes, nitrogen dioxide is considered an air pollutant.
Rain and snow remove dust, pollen, smoke and other pollutants from the air by weighing them down. The pollutants are then pressed into trees and other things until rain once again washes them away.
no
"lead" is the air pollutant that decreased most in 1970 to 1991.
Ozone is considered to be the most common air pollutant in the United States.
Do you mean... natural Primary pollutant in the air and all the thick particulates.
Carbon dioxide is the air pollutant that most concerns Americans.