Numerous German and Polish municipalities are taking pioneering action for the climate and, thus also, for the implementation of the Paris Agreement. More than 800 Polish municipalities have applied for funding for the development of low-carbon growth plans. The German Environment Ministry (BMUB) is involved in expanding advisory assistance services for these municipalities. At the moment, the BMUB is supporting two projects that facilitate German-Polish exchange at local and regional level through the establishment of climate action city partnerships, among other initiatives. Partner cities in Poland and Germany, for example Herten and Szczytno, Wunsiedel and Łapy, are actively cooperating on municipal-level climate action and issues of air quality control. The cooperation covers topics including energy upgrades for public buildings, increasing the share of electricity from renewable sources and reducing energy consumption, e.g. through modernising street lighting. Polish municipalities show particular interest in cooperation on financing issues and public participation processes.