Uncertain Climate at Harvard Business School

Doug Koplow got a nasty surprise at his last Harvard Business School reunion. He’d missed the Saturday speakers because of family duties, but at the dinner that evening, he got an earful. “I was the token environmentalist in my class,” he recalls, “so everyone came up to tell me that there had been a great speaker on climate change—and that it was just not a big deal for business.” Why not? The speaker told the high-powered alumni that recent warming is mostly just part of a natural cycle, so there's little need to cut emissions of carbon dioxide and other gases that enhance the Earth's natural greenhouse effect...