Al Gore gave a speech last week "challenging" America to run "on 100% zero-carbon electricity in 10 years" -- though that's just the first step on his road to "ending our reliance on carbon-based fuels." Serious people understand this is absurd. Maybe other people will start drawing the same conclusion about the man proposing it.

The former vice president has also recently disavowed any intention of returning to politics. This is wise. As America's leading peddler of both doom and salvation, Mr. Gore has moved beyond the constraints...