see you want " proof" but you know that there will never be some smoking gun "proof" regardless if its true or not because of all the variables and crap. But what we can say, is that evry major study, UN, US Goverment ( even Bush's own) all come back with same thing..Man is causing it.
how about you prove that dumping pollution and huge amounts of CO2 has zero effect on the earths temp.
Well as far CO2 goes even Gore is saying that it isn't the major player in "Climate Change". There have been quite a few studies that make the argument of our CO2 emissions now as opposed to the Industrial era isn't even close. As far as UN and US government studies are concerned it seems that all government funded scientist and studies come back with a pro global warming argument where as private studies with nothing to gain come back saying the opposite. However even some of the government scientist are jumping ship now, and then there was the whole climate gate scenario a few months back.