Quote:Right, we exhale because we are polluted. People who are in good shape produce less CO2, so maybe the EPA should regulate fitness as well. Yeah? Tell that to a plant.If you seriously want to question the toxic effects of CO2 on the human body, you might want to take it up with Wiki. Not only do they mention it on their main page for CO2, they even have a special Carbon Dioxide Poisoning page.
Btw, there is also the opposite of CO2 poisoning. A shortage leads to problems too, but far less severe. Particularly interesting is the following, if you think of certain arguments used in the torture thread.
http://en.wikipedia.org/wiki/Hypocapnia
"Self-induced hypocapnia through hyperventilation is the basis for the deadly schoolyard fainting game. Deliberate hyperventilation has been unwisely used by underwater breath-hold divers to extend dive time but at the risk of shallow water blackout, which is a significant cause of drowning."