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Climate change is the defining issue of our time - we know, beyond reasonable doubt, what that science now tells us. Just as climate change is accelerating, so too must we - summoning up a greater sense of urgency, courage and shared endeavour than humankind has ever seen before.The Age of Climate Change is an age of superlatives: most extreme this, biggest that, most costly ever. The impacts worsen every year, played out in people's backyards and communities, and more and more people around the world now realise this is going to be a massive challenge for the rest of their lives. In Hope in Hell, Porritt confronts that dilemma head on. He believes we have time to do what needs to be done, but only if we move now - and move together. In this ultimately optimistic book, he explores all these reasons to be hopeful: new technology; the power of innovation; the mobilisation of young people - and a sense of intergenerational solidarity as older generations come to understand their own obligation to secure a safer world for their children and grandchildren.