From mother nature network:
It’s hard to get more ridiculous than this- GOP Congressman Joe Barton (Texas, ExxonMobil) […] went on C-SPAN and said we shouldn’t be worried about CO2 because it’s “not hazardous to your health” and it’s “natural”. He said:
I’m creating it as I talk to you. It’s in your Coca-Cola, your Dr. Pepper and your Perrier water. It’s necessary for human life. It’s odorless, colorless, tasteless, doesn’t cause cancer, doesn’t cause asthma. There’s nobody that’s ever been admitted to a hospital because of CO2 poisoning.
HYSTERICAL RAISINS 
