Radon
Radon is a naturally occurring radioactive gas that is given off by some types of rock and soil. Radon has no color or odor. It can seep into basements and the lower floors of buildings. Radon exposure is the second leading cause of lung cancer in this country. A radon detector sounds an alarm when levels of the gas in indoor air become to high. If radon is present, increasing a building's ventilation can eliminate any damaging effects. This requires the attention of experts.
Radon is an indoor air pollutant that can be a warning to home owners.
The most common indoor air pollutant is air freshener.
Radioactive pollutants
One example of a deadly pollutant not created by fossil fuels is highly toxic radioactive waste, which is the bi-product of using radioactive isotopes.
A lot of substances are not air pollutant. You must specify which kind of substance do you refer as a probable air pollutant.
Pollutant
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.
secondary pollutant. deals with oxygen in air
Carbon dioxide is the air pollutant that most concerns Americans.
Ozone is a pollutant. It is at ground level a pollutant.