The joint meeting of the two ZIM networks PlaMoWa Europe and PlaWas took place from 14th – 16th October 2019 in the premises of Deutsche Umwelthilfe and in the Zeiss-Großplanetarium in Berlin. The focus was on new research and development projects emerging from the network and carried out in cooperation. The highlight was a guest lecture by Berliner Wasserbetriebe on the topic of water pollution, and the project management organisation VDI/VDE Innovation + Technik GmbH was also represented to provide insights into the R&D project work within the framework of ZIM.