We've got recent ice core samples, for one. Almost weekly, there are new data that are highly consistent with a rapid increase in C02 in the last 50 years and a corresponding increase in temperature. Check out recent issues of Science or Nature. I'm not sure where the skepticism is propogated from, but it certainly isn't from any scientific body in the US or elsewhere. No scientist would argue global warming is definitely caused by human activity, but the vast majority of relevant scientists (from what I know) would say it's extraordinarily likely. No scientist wold say we need conclusive proof (that will never come). Only non-scientists make that argument. (I know those aren't your words.)Shiftkey said:There's more to it than that. I'm the last person to support Bush, but I don't consider global warming to be the problem most people think it is either. Now I KNOW global warming exists. It's happened before in cycles - I've learned all about it in Oceanography class (in which the Professor himself convinced me about the myths of global warming). But to think people can cause it? That's giving us too much credit. There isn't any real data to support it if you look at the big picture. The only data we have is less than 100 years old, when the earth is billions of years old. I don't think we should pollute with impunity for many other reasons, so you won't ever see me protest against people worried about global warming, but there's more politics behind global warming than science.
Anyone who thought Iraq was worth invading pre-emptively ought to think it's worth acting pre-emptively against the potential consequences of global warming. It's a simple cost-benefit analysis.