dcraig, the problem with Al Gore's movie is this. Al uses ice core samples as his basis to show evidence that CO2 emissions and global warming are related. He is correct, but every ice core sample ever taken shows the same thing. Increased CO2 emissions lag global temperature increases, by as much as 700 years. For whatever reason increased temperatures cause an increase in CO2 not the other way around. Al Gore knows this and is a flat out lying piece of crap.