In Chapter 10, Shabb, McCormick, Anderberg and Mujkic investigate how Climate City Contracts (CCCs) are being developed in Europe and what it means for other parts of the world. CCCs are intended to be different from current strategies to tackle climate change because they are designed as part of a larger mission with many stakeholders, funding and growing momentum. CCCs are a mechanism to ensure that city-level work is not occurring in a vacuum but rather facilitates multi-level integration between cities, national agencies, and the European Union, but also collaboration across all stakeholders. The current focus of CCCs is mostly on the process rather than outcomes. Ambitious Climate Investment Plans, which encompass private sector efforts, are necessary to underpin the goals and activities outlined in CCCs.