Liberal interest groups, think tanks, lobbyists, bloggers and other nuisances are inundating the incoming Obama Administration with advice, but James Hansen recently managed to say something interesting. Namely, the famous NASA scientist had the nerve to expose some of the global-warming fantasies widespread among children and politicians.

No, the spiritual leader of the climate-change movement hasn't recanted. Global warming threatens "not simply the Earth, but the fate of all its species, including humanity," he writes in...