Crowbar, where did you read that Bush caused global warming? It is just that he is taking no steps to ameliorate the causes and the effects. We can and do blame the GWuB for lots of things, and with good reason. If he took notice of the phenomenon and instated measures meant to begin rolling back some of the causes, he could still improve some of the labels that will eventually be attached to his presidency. But he's evidently too dumb and too stubborn in his stupidity to be aware of it.