Lord Nicholas Stern discusses how we can change minds and political will surrounding climate change when science and facts fail to do so.  Lord Stern believes that we need to make it clear that the risks are enormous, and to exhibit change that is attractive.  "We can't give out, we can't just say, 'Oh, this political will stuff is all too difficult.  It's not going to happen.' Well, if that's what you really believe, then get a hat and write a letter of apology to your grand children."