On Jan 7, 2009, at 11:47 AM, thomas malloy wrote:
... the percentage of oxygen in the atmosphere is decreasing. It
has gone from 22% to 19% over the last few years. When the
percentage falls into the single digits, people will begin to die.
Over what time frame has this oxygen drop occurred and according to
what scientific source?
"Between 200 and 250 million years ago, up to 35% of the atmosphere
was oxygen (as found in bubbles of ancient atmosphere preserved in
amber)."
http://en.wikipedia.org/wiki/Earth's_atmosphere
That's an average decline of 0.08 percent per million years. Unless
there has been a *huge* recent change, this is a trivial problem
compared to runaway global warming which has the potential to wipe
out presently living people.
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
