Depends on how you define pollutant. If we define a pollutant as something actively and instantly harmful, CO2 is not a pollutant. If we define it as something that can cause serious environmental problems and destabilize natural systems when present in elevated concentrations, it certainly is a pollutant.Kerry fesses up:
http://www.breitbart.com/big-govern...-admits-american-co2-cuts-would-be-pointless/
Still waiting for an explanation how carbon is a pollutant, but what do I know.
Without any carbon dioxide, they won't be able to grow all the ganja they must be smoking.
The most benign things can kill you. Water is vital to your survival but will kill you in high enough concentrations via dilutional hyponatremia.