It's odd how little we've heard lately from the skeptics who deny that climate change is real. What's the matter, people? Heat stroke? The Venus-like heat that much of the country has been suffering this summer is almost enough to make anybody a believer in global warming. Almost, but not quite: Honesty compels me to acknowledge that a few weeks of record-setting temperatures do not constitute proof of anything. Climate scientists have to analyze data covering decades and centuries to discern what's really going on. Of course, the unusually heavy snowstorms that buried Washington and other East Coast cities last...