Re: Oxygen content of the atmosphere over the last 10,000 years

Peter C. McCluskey (
Fri, 6 Aug 1999 12:51:50 -0700 (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.

Peter McCluskey          | Critmail ( | Accept nothing less to archive your mailing list