Meet Jim Rogers, a great American paradox. Rogers is the CEO of Duke Energy, a huge power company and a major polluter that lost an important U.S. Supreme Court case this week, but he is also one of the United States' leading advocates for federal regulation of greenhouse-gas emissions. In this wide-ranging interview with Amanda Griscom Little of Grist magazine, Rogers talks about the professional, political, and personal factors that fuel his concern about climate change.