Not Spaghetti

I recently corresponded with a colleague who has acquired a degree of "skepticism" regarding global warming. His comments to me specifically cited Freeman Dyson and Will Happer, distinguished physicists who are also well-known global-warming skeptics, and he contrasted their credentials with those of John Holdren (Obama's new science advisor) and Al Gore. The following is a lightly edited version of my response, which I'm posting here mainly as a place for some useful links on the subject.