07-13-2003, 06:24 PM
Quote:Originally posted by Toronto HottieIt's 21%, and this fact is 100% false. Such a drastic change in the oxygen levels on the planet would likely kill off millions of species, ourselves included.
50 years ago, the oxygen level on earth was 30%, today, it's 18%, on a good day excluding smog/pollution/general farts.
Consider these facts, from this page:
-Oxygen deficient atmosphere. When the oxygen content is below 19.5 percent, it is too low to provide enough oxygen for a working person.
-Oxygen enriched atmosphere. Oxygen content above 23.5 percent causes combustible substances to burn more vigorously than in normal atmosphere. For instance, in an oxygen enriched atmosphere, a person's hair, clothing, and even skin will burn rapidly if ignited.
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