Comment

EPA Finds Greenhouse Gases Threaten Health and Environment

228
Jetpilot110112/07/2009 5:55:53 pm PST

re: #224 saik0max0r

You can also die from being exposed to concentrated amounts of oxygen.

Exactly how high of a concentration? Maybe it’s news to you but fighter pilots routinely breath 100% O2 on missions and to my knowledge, not many of them are keeling over in the cockpit.