2007-02-03 07:14:53 · 3 answers · asked by kevin g 1 in Environment
The correct level is 20.9% ,the first alarm point up is 21.5 . The critical level above that is 23.5 % at this point everything will burn like gasoline is on it. The astronauts that burned up was in an atmosphere of 100% oxygen but at 3 psi. Very dangerous . The lower end is 19.5 % ,just below this and u pass out .
2007-02-03 07:23:33 · answer #1 · answered by JOHNNIE B 7 · 1⤊ 0⤋
You are getting some bogus answers, Kevin. Just 150 years ago the oxygen level in the atmosphere--yes, for the whole planet Earth-- was 33%.
A person can breath 100% oxygen for up to 10 hours without permanent damage. Hospitals routinely use 50% oxygen on some patients.
On the low end, we die at less than 8% oxygen.
Best of luck.
2007-02-03 15:32:16 · answer #2 · answered by Dorothy and Toto 5 · 0⤊ 0⤋
It's known from experimentations that at 23% of oxygen plants start catching fire.
Current oxygen in the atmosphere is 21%
BTW you can breathe pure oxygen.
Plants can survive very well even with 1% of Oxygen in atmosphere (a little is necessary even for plants)
You cannot survive if the atmosphere has less than 19% of oxygen.
2007-02-03 15:25:19 · answer #3 · answered by scientific_boy3434 5 · 0⤊ 0⤋