Note that carbon as diamond or graphite is a solid not a gas. Carbon in the first form is highly prized by the female of the species and they do not regard it as pollution in any way.
A colourless gas which makes up about 0.04% of the atmosphere. It is denser than air. It is toxic only above about 6% concentration, but it does not support respiration or combustion. It is excreted as a waste product of aerobic metabolism, and is carried to the veins, mainly as hydrogen carbonate (bicarbonate) ions. Expired air contains about 4% carbon dioxide.
As we breathe out carbon dioxide it is not a pollutant!
What you see coming out of a smokestack is not carbon dioxide because it is invisible and the usual photos show cooling towers which only emit steam.
So Julia what are you talking about when you say "carbon pollution".