Just to continue my contrarian view of the world, I have listed the newest blog by Prof Philip Stott! Do have scan over it.
http://web.mac.com/sinfonia1/Global_Warming_Politics/A_Hot_Topic_Blog/Entries/2008/8/19_Cognitive_Dissonance.html
The bit I really think sums it up appears in one of the later chapters, it says:-
“climate change is governed by hundreds of factors, or variables, and the very idea that we can manage climate change predictably by understanding and manipulating at the margins one politically-selected factor is as misguided as it gets.”