“If you believe, like I do, that something has to be done on this, then you’re going to have to speak out,” Obama told students and faculty at the University of California at Irvine last June. “You’ve got to educate your classmates, and colleagues, and family members and fellow citizens, and tell them what’s at stake.” Problem: 1 in 4 Americans are “solidly skeptical” about climate change, and another 1 in 3 have “mixed” views about it, leaving only slightly over 1 in 3 “concerned believers.” Combined, those 6 in 10 Americans who don’t buy into his climate alarmism make...