The world is not exactly lacking in rich men with big ideas about what other people should do, or who think technology can fix any problem. And I own big houses and fly in private planes—in fact, I took one to Paris for the climate conference—so who am I to lecture anyone on the environment? I plead guilty to all three charges. I can’t deny being a rich guy with an opinion. I do believe, though, that it is an informed opinion, and I am always trying to learn more.