The mystery resolved at last!

Having just sent a letter from my favorite outfit, Union for Concerned Scientists, to the Hannity crockpot giving him a failing grade in science, it dawned on me why the man cannot understand global warming: in order to think, he has to hold his breath in order not to overload his brain. In the inimitable words of the formidable Jim Hightower, if the man's I.Q. drops another point, we're gonna hafta water him.