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Re: Atmospheric O2

I agree. There are only two ways of increasing the O2 concentration  ....
by fractional distillation of liquid air and by use of a molecular sieve bed
which separates oxygen from nitrogen/other gases and reconcentrates
same. This is 20th Century technology and did not exist before now.
Air trapped inside amber made millions of years ago would have the same
oxygen concentration as that of its atmosphere.

Steve Grenard
Date: 09/12/95
Time: 15:37:24

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