What greenhouse gases (CO2) are not!!!!

1. Visible with the naked eye from an old car -- NOPE (probably black soot)
2. Funny smell from the tail pipe -- NOPE (other potentially harmful gases)
3. Can kill you if you have the car running in the garage -- NOPE (that is carbon monoxide -CO)
4. Causing the Ozone hole -- NOPE (those are CFCs)
5. Only last for a few days and then disappears --NOPE (long lifetime 80-200 years) -- The CO2 molecules that we produced by driving today will be around long after we are gone.

HOWEVER -- GREENHOUSE GASES ARE GENERALLY PRODUCED WHENEVER THERE IS COMBUSTION (driving, heating our homes, production of electricity from non-nuclear plants).