Environmental problems have an international—even a global—character. Environmental politics is therefore, at least in part, an international politics. ‘Local and global, North and South’ considers how the national and international dimensions work—or not—together highlighting an apparently insurmountable faultline between the global North and the global South. Despite numerous obstacles, multilateral environmental agreements are possible. By comparing and contrasting two cases—the ozone layer and climate change—the factors and conditions that make for successful agreements are analysed. The local level, which is also crucial to environmental politics, is then considered because this is where environmental implications are felt most viscerally and its battles are fought most keenly.