Climate change is creating major challenges for municipalities worldwide. At the same time, local actors have a key role to play in measures for climate change mitigation and adaptation. Through climate partnerships, together with their partners in the Global South German municipalities are assuming shared responsibility for the world’s climate. The work carried out within these partnerships reflects the principle of joint but differentiated responsibility. The project is initiating a bottom-up process that will take up the challenges posed by climate change. By supporting strategic climate partnerships agreed on between municipalities, we intend to help transfer existing municipal expertise and generate new knowledge.