Warnings about cataclysmic warming increase in stridency as evidence of warming becomes more elusive. A recent report from the United Nations Environment Program predicts an enormous 6.3 degrees Fahrenheit increase by the end of the century even if nations fulfill their most ambitious pledges concerning reduction of carbon emissions. The U.S. goal is an 80 percent reduction by 2050. But Steven Hayward of the American Enterprise Institute says that would require reducing greenhouse gas emissions to the 1910 level. On a per capita basis, it would mean emissions approximately equal to those in 1875.

That will not happen. So, we are doomed. So, why try?

America needs a national commission appointed to assess the evidence about climate change. Alarmists will fight this because the first casualty would be the carefully cultivated and media-reinforced myth of consensus — the bald assertion that no reputable scientist doubts the gravity of the crisis, doubts being conclusive evidence of disreputable motives or intellectual qualifications. The president, however, could support such a commission because he is sure “there’s finally widespread recognition of the urgency of the challenge before us.”