One can prove SO2 and NOx harm the environment.
Thus far, NO ONE has come forward with substantive nor conclusive evidence or data that CO2 harms the environment. Although it does make plants grow. Well, at least that was what we learned in 5th grade science. Then again, I did attend public school.
So in a nutshell.... stop dumping mercury in the ocean, stop dumping prescription meds down the toilet, put scrubbers on coal power plants, and don't throw your trash out the window. Dispose of it properly. Recycle if you want.
BUT YOU CAN NOT TELL ME BURNING GASOLINE OR ANY OTHER HYDROCARBON IS CAUSING THE EARTH'S AVG ANNUAL TEMPERATURE TO RISE! PROVE IT!