"Such optimism is urgently needed because one of the most important effects of the global warming debate is that it has so disheartened people, they simply turn away. We are flinching. This is too big, too frightening to think about. many felt the same way about the rise of Hitler, or the likelihood of nuclear holocaust in the sixties. ‘You can’t just turn your back’ some say. Oh yes you can. Without hope, without a clear sense that, beyond the struggle, there are blue skies and a life worth living, then most of us will turn away and try not to look."