Does an Old Climate Critique Still Hold up? - Andy Revkin - Dot Earth Blog - NYTimes.com

I have yet to see anyone provide definitive evidence — with no error bars — that the fingerprint of human-generated greenhouse gases (or other emissions or actions) is unequivocal. The only thing described as “unequivocal” in the report was the warming, not the cause, unless I really haven’t been paying attention for the last two decades.