The Influence of the Paris Agreement on Climate Litigation: Legal Obligations and Norms (Part I)∗

The Paris Agreement is the first universal climate change agreement requiring all parties to communicate ambitious greenhouse gas (GHG) reduction targets to achieve a long-term global temperature goal. The Paris Agreement is a game-changer at the international level, but has it been at the national (and sub-national) level? What has been the influence of the Paris Agreement on litigation to improve mitigation of, and adaptation to, climate change? This question is addressed in two articles. Both articles seek to look at a familiar topic—the Paris Agreement and climate litigation—in new and fresh ways. This first article examines how the Paris Agreement is directly implemented through incorporation into the domestic laws of the signatories as well as indirectly implemented through judicial decision-making in accordance with norms under the Paris Agreement. First, the article examines the international obligations created by the Paris Agreement, noting the flexible nature of the agreement and wide margin of discretion left to parties. Secondly, it explores how the Paris Agreement is incorporated in domestic laws and policies. The potential for litigation based on these international and domestic obligations will be considered. Thirdly, it discusses the courts’ application of norms under the Paris Agreement.