CNN: Ben Carson says there's no convincing research to prove that man plays a role in climate change.
So California Gov. Jerry Brown has sent the retired neurosurgeon a U.N. report so he can brush up on the subject.
In a letter Brown sent to Carson on Thursday, he cited comments the Republican presidential contender made to the San Francisco Chronicle this week in which he said, "There is no overwhelming science that the things that are going on are man-caused and not naturally caused. Gimme a break."...