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Re: Atmospheric O2

In a message dated 95-09-12 18:29:25 EDT, grenard@herpmed.com writes:

>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.

Either that, or the second law of thermodynamics was not operating during the
Mesozoic. :-)