ate deniers and catastrophists, the intelligent layperson is understandably bewildered when faced with the complexity of climate change. How To Think About Climate Change shows that economics provides not just a suitable, but an indispensable perspective to understand the root causes of the climate-change problem: scarcity of resources, externalities and free riding. Riccardo Rebonato argues that there are no silver bullets or easy solutions. However, he shows that the new-generation economics models offer a radically different insight about our best course of action from what most early models recommended - in particular, they suggest that fast and large-scale climate action can now be justified as the most cost-effective strategy without requiring the 'infinite altruism' of earlier models. Given the conceptual tools provided in this book, readers can decide whether they agree with these conclusions - and, if they do, what the most effective courses of action are.