Today, U.N. negotiators will begin two weeks of meetings in Cancun, Mexico, looking for a way to move the climate action agenda forward, impose global carbon emissions caps and compel countries to pay a series of new international taxes to underwrite environmental programs. Maybe they'll get what they want when hell freezes over.The mood of climate alarmists going into Cancun is decidedly downbeat. The sense of impending doom they had cultivated over the last decade or so has largely evaporated. The Climategate scandal took a severe toll on the credibility of some of the climate theology's leading high priests,...