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This article shows projects in which heat is generated from water. ???? Click here for more environmental topics: https://1.ard.de/unkraut-start ???? We still heat mainly with oil and gas. For a climate-neutral future, air and groundwater heat pumps are on the rise. But there are other solutions for the heat transition: There is huge potential in our lakes, our rivers and our wastewater. It takes a lot of pioneering spirit to get involved with these heat sources. ???? In this film, a film team accompanies pioneering projects in Bavaria: In Prien am Chiemsee, the water park is to be heated with heat from the lake instead of gas. However, the local council wants to carefully examine whether the lake heat project is economically viable. ???? The mayor of Mersburg on Lake Constance is currently tackling municipal heat planning. Following the Swiss model, he also wants to use heat from the lake. He is now seeking support from authorities, conservationists and fishermen. He also needs this from the business people in the old town - when the streets have to be torn up to lay the pipes. ???? The heat from the sewer is to be used for the construction of a new clinic in Memmingen. For this purpose, heat exchanger mats are laid in the sewer. In Regensburg, the House of Bavarian History is already heated in this way and even cooled in summer. Authors: Sabine Frühbuss, Berit Breitsamer #energy #heating #lakeheat