In the context of the climate crisis and the accompanying social change, the project explores the relationship between Berlin and the Spree, the urban space, the citizens and the body of water. How can the river be given its own "political" voice and what can help to create more awareness about the Spree and the influence of humans? With the help of the buoy developed in the project, the water body draws attention to pollution. Digital tools and media such as measuring devices and app record the actual state of the river and communicate this to citizens in an accessible way. Exciting historical and current contributions around the topic are also communicated. In the hot summer months, the buoy also pumps oxygen into the river and supplies it to the Spree and it’s creatures. The planet-centric approach provides a holistic and "green" solution to the various problems and ensures a healthier balance between the stakeholders involved.