He did not say that "he" thinks that global warming is human-induced -- he said that he only knows what is being reported as to the scientific "consensus" on the matter.
As a politician and not a scientist, he would be trapping himself if he went further than that.
Senator Inhofe from Oklahoma goes much further than that - not only does he take the fight right back to the globaloney crowd, but relishes the fight. We need more pubbies willing to do that. Rudy ain't one of them that I can see.