wrote in message
ups.com...

Roger Coppock wrote:
The ultimate positive feedback for global warming!

So how much additional CO2 would be added to the atmosphere
in a worse case scenario? Assuming there's a large scale
thaw?

There are some pretty grim scare stories out there involving methane which
degrades to CO2 fairly quickly.
http://www.commondreams.org/views04/1215-24.htm

Here is a more technical but less dramatic discussion:
http://www.realclimate.org/index.php?p=227

Forget about GW for a bit. At what point does the CO2 level began
to affect our health just breathing the air? Already some models have
it reaching over 1000 ppm next century... what if it reaches 2000 ppm?
Would we still be able to breath the air?

I believe the work safety standards require levels below something like
5000ppm for 8 hour exposure. Frankly, though, I would expect many
unexpected health consequences for 24/7 exposure at levels well below that
(like even 2000ppm). What about effects on pregnancies, for example?
Better we just don't go there.

--
Coby Beck
(remove #\Space "coby 101 @ bigpond . com")