In a speech yesterday here in Washington, Al Gore challenged the United States to "produce every kilowatt of electricity through wind, sun, and other Earth-friendly energy sources within 10 years. This goal is achievable, affordable, and transformative." (Well, the goal is at least one of those things.) Gore compared the zero-carbon effort to the Apollo program. And the comparison would be economically apt if, rather than putting a man on the moon—which costs about $100 billion in today's dollars—President Kennedy's goal had been to build a massive lunar colony, complete with a casino where the Rat Pack could perform. Gore's...