Connie Hedegaard sits down with Bill Gates, the American business magnate and Microsoft co-founder to talk about climate change.Connie Hedegaard (CH): Let me start with a confession: For years, I thought you were not particularly interested in climate change. I vividly recall a closed session at Davos some years back. The discussion turned to climate, instead of other sustainability issues, and you left the room.Now you powerfully and emphatically make the case for urgent climate action.