If you don't think it is a pollutant...go breathe some of it in. What makes a "pollutant" a "pollutant"...is that it is poisonous to the organism which is releasing it. Breathing CO2 can be hazardous to your health...that is why you exhale it as a waste product...and why if you are unable to do...
"You don't believe all this cold fusion mumbo jumbo, do you?"