Quote:
Originally Posted by Amaranthus
I don't think it's credible to say 800 ppm equates to extinction of humanity, but that level of GHG forcing would cause major climatic disruptions, over a century-to-millennial time-scape, compared to the Holocene climate, and would thus require substantial technologically driven adaptation, and likely result is a lot of extinctions due to synergies with land-use change, etc.
|
What species are you? I'm a mammal, healthy air for me ends at CO2 800 ppmv. At that point advanced mammals begin to suffer acidosis of the blood as a chronic condition. This leads enviable births, birth defects and an increase in chronic diseases. 800 ppmv may not be extinction itself but it wouldn't take much more to lead to extinction.
If you're so fired up on this CO2 business, then how come you're oblivious to this?
CO2 is a waste product for animals, once the ability to expel it is compromised the end is nigh!
It depends on the species, primitive mammals, avians and reptiles can tolerate higher levels. However a level like 5000 ppmv would see the extinction of most animal forms beyond single cell.