Former President Bill Clinton was in Denver, Colorado, stumping for his wife yesterday. In a long, and interesting speech, he characterized what the U.S. and other industrialized nations need to do to combat global warming this way: "We just have to slow down our economy and cut back our greenhouse gas emissions 'cause we have to save the planet for our grandchildren." At a time that the nation is worried about a recession is that really the characterization his wife would want him making? "Slow down our economy"? I don't really think there's much debate that, at least initially, a...