This true story of how climate change became a crisis and what is possible – and now necessary – is based on a wide-ranging compilation of facts that add up to both a serious challenge and a compelling promise. We are exploring not only the scope and scale of our present climate threats, but also revealing the broad range of options from which we can choose our future actions. We know the path forward. We know that we need to tread carefully, and we can be certain that there is no time to waste.