Re: [asa] CO2 content

The other big problem with the claim is that it's not any particular
CO2 level, temperature, etc. that is ideal. The problem of modern
global warming and associated changes is that they are happening too
fast for many organisms to keep up, and also fall into that
inconvenient interval for humans of too slow to be immediately obvious
but fast enough that it will affect us over periods of years to
decades. CO2 levels have been higher in the past. Crocodiles have
lived in the Canadian Arctic at a similar latitude to its present
position. We aren't prepared to have crocodiles in Churchill, and
neither are the crocodiles, polar bears, Inuit, etc.

Higher global temperatures would probably in the long term produce
more warm, shallow seas and thus a higher diversity of mollusks, which
sounds good to me. However, it takes several million years for the
biological diversity to reach a new equilibrium level after a
disturbance.

-- 
Dr. David Campbell
425 Scientific Collections
University of Alabama
"I think of my happy condition, surrounded by acres of clams"
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