Stock Photo - 13 July 2020, Berlin: The dried out Barssee, which is a siltation bog, will be irrigated with treated water by Berliner Wasserbetriebe over the next two years. The lake is threatened by groundwater lowering and drought. In order to improve the living conditions for animals and plants in the swing-grass mire again, the acidic water required for moors, which is low in minerals and nutrients, is produced by a reverse osmosis plant. Grunewald is one of the most important water reservoirs in Berlin. Here, the wells of the Beelitzhof and Tiefwerder waterworks produce drinking water for more than one million Berliners. Photo: Jens Kalaene/dpa-Zentralbild/ZB. - Berlin/Berlin/Germany