From: Peter C. McCluskey (pcm@rahul.net)
Date: Fri Aug 06 1999 - 13:51:50 MDT
megao@sk.sympatico.ca (Arla Johnson) writes:
>I have occaisionally looked for comparisons of modern and ancient oxygen
>
>measurements but have come up empty.
See Barrow and Tipler's The Anthropic Cosmological Principle, pages 567-569.
They show a long-term trend of rising oxygen levels which threatens to cause
most vegetation exposed to the atmosphere to burn 200 million years from now.
The atmosphere has a couple of orders of magnitude more oxygen than CO2,
so human activity isn't having much influence on it yet.
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