07-04-2009, 01:26 AM
Quote:âCarbon dioxide is not a pollutant. Every time you exhale, you exhale air that has 4 percent carbon dioxide. To say that thatâs a pollutant just boggles my mind. What used to be science has turned into a cult.â-- Physics Professor William HappeMaybe the professor forgot that there is a reason why we exhale CO2. He isn't a biologist or doctor, after all. Ah well, let's hope he never finds himself locked in a room with more as 10%. He might not be able to correct his statements afterwards:whistling:
http://en.wikipedia.org/wiki/Carbon_dioxide
CO2 is toxic in higher concentrations: 1% (10,000 ppm) will make some people feel drowsy. Concentrations of 7% to 10% cause dizziness, headache, visual and hearing dysfunction, and unconsciousness within a few minutes to an hour.