In implementing the European Green Deal to align with the Paris Agreement, the EU has raised its climate ambition and in 2022 is negotiating the distribution of increased mitigation effort among Member States. Such partitioning of targets among subsidiary entities is becoming a major challenge for implementation of climate policies around the globe. We contrast the 2021 European Commission proposal - an allocation based on a singular country attribute - with transparent and reproducible methods based on three ethical principles. We go beyond traditional effort-sharing literature and explore allocations representing an aggregated least regret compromise between different EU country perspectives on a fair allocation. While the 2021 proposal represents a nuanced compromise for many countries, for others a further redistribution could be considered equitable. Whereas we apply our approach within the setting of the EU negotiations, the framework can easily be adapted to inform debates worldwide on sharing mitigation effort among subsidiary entities.

在实施欧洲绿色协议以与《巴黎协定》保持一致时，欧盟提高了其气候雄心，并在 2022 年就增加的缓解努力在成员国之间的分配进行谈判。子公司实体之间的这种目标划分正在成为全球气候政策实施的主要挑战。我们将 2021 年欧盟委员会的提案（基于单一国家属性的分配）与基于三项道德原则的透明且可重复的方法进行对比。我们超越了传统的努力分享文献，探索了代表不同欧盟国家对公平分配观点之间的最小遗憾妥协的分配。虽然 2021 年提案对许多国家来说是一种微妙的妥协，但 对于其他人来说，进一步的再分配可以被认为是公平的。虽然我们在欧盟谈判环境中应用我们的方法，但该框架可以很容易地适应全球范围内关于在附属实体之间共享缓解努力的辩论。