P.S. This just in. Now being carried by a few national newsfeeds, an interesting breakdown of the U of Queensland reserch paper by John Cook. This is the study widely reported to be the primary scientific analysis supporting the 97% consensus on climate change that friend Joe and other internet luminaries banty about.
It turns out Joe is right, 97% of scientists with a definative opinion agree on climate change being driven by man.
What is somwhat less discussed is that the study reveals that over 66% have, in fact, no definative opinion which means the actual population of climate scientists with belief in man made climate change is about 33 percent.
Hey Joe, pick yourself up a copy of " how to lie with numbers " send me the bill, I'll write it off to community service.

Oh, and I should add, that 30% cosensus involves the agreement that man has "any" roll in the process, not the dominant role.