actually it’s both, so don’t be so quick to jump on him. The exhaust of an idling car is about 15% carbon dioxide. The complete combustion of hydrocarbons (gasoline or diesel) yields only water and CO2 (carbon dioxide). Since it’s never perfect, though, there is always some CO (carbon monoxide), which is indeed a lot more poisonous than CO2. Much is scrubbed in the catalytic converter but not 100% of it.
So even if your super-high-tech car somehow emitted no CO, running it in a closed garage would still kill you by 1) using up all the oxygen (to burn the gasoline) and 2) converting it to CO2 which would smother you.
I’m not agreeing with Bachmann by any means, but that logic doesn’t actually make sense, DrCharles. Of course you would die in a room without oxygen; if the room were filled with water, it doesn’t make water a dangerous chemical because you die. You die because there is no oxygen, not because water is poisonous to you. We breathe in carbon dioxide all the time, it is a component of the air which we breathe in. Carbon monoxide, on the other hand, actually kills you even with oxygen present because carbon monoxide bonds to the hemoglobin in your blood before oxygen does; thus, you suffocate even in the presence of oxygen.
That all being said, what Bachmann meant had nothing to do with carbon dioxide being poisonous to humans in the way CO is.
Being another angry archaeology student, I was going to point out the inaccuracy of the T-Rex comment (an otherwise hilarious post). It’s already been done, so I won’t bother. Only I did, because 1) I’m a douche and 2)I’m getting fed up of being asked about crystal skulls/dino bones.