A complex legal regime has evolved to frame climate governance, encompassing interconnected public international law, transnational law and private law elements. At the core of the international effort are the UNFCCC, the Kyoto Protocol and now the Paris Agreement, the first two of which have spawned innovative features such as carbon trading mechanisms and a sophisticated compliance regime. Municipal legislative action dealing with mitigation and adaptation is gathering pace. The focus of the peer-reviewed journal Climate Law is on the many legal issues that arise internationally and at the state level as climate law continues to evolve.