Fragile

Climate modelling now shows that a 10-30 Cº change in average surface temperature could kill 95% of marine species and 75% of land species. More accurately and less dramatically, this probably is what happened some 250 million years ago. We know for sure that many species died out, and new models show that a rise in CO₂ leading to global warming could do it.

OK Bush, try and write that one off as alarmism and say that car manufacturers don't have to do anything. Someone remind me, how much has the temperature risen this century? Since the industrial revolution? Within the last millenium? 250 million years ago vulcanism was the ultimate cause, but does it really matter WHY there's more CO₂? Once you've risen 5 Cº and killed off a tenth of the land species you'd do well to worry.