By most accounts carbon dioxide is not a pollutant per se. When we talk about say, air pollutants, we normally mean such things as carbon monoxide, sulfur dioxide, chlorofluorocarbons (CFCs) and nitrogen oxides.
Carbon dioxide is widely accepted as being a contributor to rising global temperatures hence the term Greenhouse Gas. The Kyoto Protocol, which came into force in 2005 lists carbon dioxide and five other gases (for reduction).
There is a lot of real scientific research which links increases in atmospheric carbon dioxide to rises in average temperature over long periods of time. Yes, I know that most of the studies over the past 50 years have been subject to some criticism but the overwhelming majority of scientists believe that there is a real relationship between increases in CO2 and global temperatures.
Having said that, I'll still be using my boat to go fishing
Fris Out