Evidence for Anthropogenic Climate Change

Here is a presentation by Dr. Richard Alley, a geologist at Penn State University on the evidence for global warming caused by CO2 from the burning of fossil fuels. Gets a little technical at times but friendly to non-scientists.

http://www.agu.org/meetings/fm09/lectures/lecture_videos/A23A.shtml

He demonstrates, though it is not his purpose, how a true empirical skeptic views the evidence. In my view, in order to disprove that increased CO2 concentration is the cause of the current warming you'd have to show some other cause or show that CO2 is not a greenhouse gas. The question of higher concentrations of CO2 is not controversial, it is simply a fact. To believe otherwise is akin to denying any scientific understanding of chemistry and physics.