MANN: '...if you look back at a scientist like Einstein, he played a very profound role in the political discussion (on developing nuclear weapons). This is a different sort of threat, a threat the whole world is being subjected to by human-caused climate change, but an even greater existential threat to civilisation.'
Lesley Stah: 'All these floods we've heard about – much more disastrous than they have been in our lifetime. That's because the ice is melting.'
NYT' Tom Friedman: 'Young Arabs will tell you is, 'Hey, we've tried everything. We tried nationalism, socialism, Communism, Islamism, capitalism, liberalism, and nothing worked.' And I always tell them there's actually one 'ism you haven't tried, and that's environmentalism. And that's actually not a joke.'