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RE: Oxygen %

>> The paper indicates that the O2 level during the Permian was 14% <<

Just curious... Plants are known to be 400 million years old... What was the 
oxygen
level back then?

>> Oh, what a jump. What is the oxygen content today on Mt. Everest where
recreation is impossible for humans? <<

I can't stress this one enough. We NEED an answer...

- Thomas Miller

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