Nestle CEO Peter Brabeck-Letmathe claimed in Davos Friday that global warming is not really a problem. He didn't use those exact words, but he said as much in a number of amazingly iconoclastic comments he made on a panel at the World Economic Forum devoted to potential obstacles to global growth.

Brabeck-Letmathe said, among other things, that today's warming is not unusual compared to periods before the year 1000, for example, when "Greenland really was green." He also said that around 1830 there was a warming...