I have a ten mile commute to work on my bicycle, about three miles of which is along Highway 36 between Denver and Boulder. If the wind is blowing the wrong direction, the pollution from the cars is physically sickening.
CO2 is a harmless and essential trace gas. It has no odor or side effects. There are lots of very real pollution problems the EPA needs to be focused on. The pointless and inane focus on CO2 keeps civilization from making progress.