dpatop - 09 June 2019, North Rhine-Westphalia, Moers: Joshua Redman, saxophonist from the USA, plays in the project "Moers Abstractions" with the WDR Bigband. The traditional festival for improvised music presents 99 concerts at 35 venues with musicians from all over the world until Monday. Photo: Bernd Thissen/dpa

04 June 2019, Saxony, Markersbach: The upper reservoir of the Markersbach pumped storage power plant, recorded with a drone. The pumped storage plant was commissioned in 1979 and, with an installed capacity of 1,050 megawatts, is the second largest pumped storage power plant in Germany. The upper basin on the hilltop of the Hundsmarter at about 850 metres above sea level has a reservoir volume of 6.5 million cubic metres of water. These are sufficient for about four hours of power generation. Photo: Jan Woitas/dpa-Zentralbild/dpa

04 June 2019, Saxony, Markersbach: The upper reservoir of the Markersbach pumped storage power plant, recorded with a drone. The pumped storage plant was commissioned in 1979 and, with an installed capacity of 1,050 megawatts, is the second largest pumped storage power plant in Germany. The upper basin on the hilltop of the Hundsmarter at about 850 metres above sea level has a reservoir volume of 6.5 million cubic metres of water. These are sufficient for about four hours of power generation. Photo: Jan Woitas/dpa-Zentralbild/dpa

04 June 2019, Saxony, Markersbach: The upper reservoir of the Markersbach pumped storage power plant, recorded with a drone. The pumped storage plant was commissioned in 1979 and, with an installed capacity of 1,050 megawatts, is the second largest pumped storage power plant in Germany. The upper basin on the hilltop of the Hundsmarter at about 850 metres above sea level has a reservoir volume of 6.5 million cubic metres of water. These are sufficient for about four hours of power generation. Photo: Jan Woitas/dpa-Zentralbild/dpa

04 June 2019, Saxony, Markersbach: The upper reservoir of the Markersbach pumped storage power plant, recorded with a drone. The pumped storage plant was commissioned in 1979 and, with an installed capacity of 1,050 megawatts, is the second largest pumped storage power plant in Germany. The upper basin on the hilltop of the Hundsmarter at about 850 metres above sea level has a reservoir volume of 6.5 million cubic metres of water. These are sufficient for about four hours of power generation. Photo: Jan Woitas/dpa-Zentralbild/dpa

04 June 2019, Saxony, Markersbach: The upper basin of the pumped storage power plant Markersbach, in the background the Fichtelberg, taken with a drone. The pumped storage plant was commissioned in 1979 and, with an installed capacity of 1,050 megawatts, is the second largest pumped storage power plant in Germany. The upper basin on the hilltop of the Hundsmarter at about 850 metres above sea level has a reservoir volume of 6.5 million cubic metres of water. These are sufficient for about four hours of power generation. Photo: Jan Woitas/dpa-Zentralbild/ZB

04 June 2019, Saxony, Markersbach: The upper reservoir of the Markersbach pumped storage power plant, recorded with a drone. The pumped storage plant was commissioned in 1979 and, with an installed capacity of 1,050 megawatts, is the second largest pumped storage power plant in Germany. The upper basin on the hilltop of the Hundsmarter at about 850 metres above sea level has a reservoir volume of 6.5 million cubic metres of water. These are sufficient for about four hours of power generation. Photo: Jan Woitas/dpa-Zentralbild/ZB

04 June 2019, Saxony, Markersbach: The upper reservoir of the Markersbach pumped storage power plant, recorded with a drone. The pumped storage plant was commissioned in 1979 and, with an installed capacity of 1,050 megawatts, is the second largest pumped storage power plant in Germany. The upper basin on the hilltop of the Hundsmarter at about 850 metres above sea level has a reservoir volume of 6.5 million cubic metres of water. These are sufficient for about four hours of power generation. Photo: Jan Woitas/dpa-Zentralbild/ZB

04 June 2019, Saxony, Markersbach: The upper reservoir of the Markersbach pumped storage power plant, recorded with a drone. The pumped storage plant was commissioned in 1979 and, with an installed capacity of 1,050 megawatts, is the second largest pumped storage power plant in Germany. The upper basin on the hilltop of the Hundsmarter at about 850 metres above sea level has a reservoir volume of 6.5 million cubic metres of water. These are sufficient for about four hours of power generation. Photo: Jan Woitas/dpa-Zentralbild/ZB

04 June 2019, Saxony, Markersbach: View from the upper basin onto the lower basin of the pumped storage power plant Markersbach, taken with a drone. The pumped storage plant was commissioned in 1979 and, with an installed capacity of 1,050 megawatts, is the second largest pumped storage power plant in Germany. The upper basin on the hilltop of the Hundsmarter at about 850 metres above sea level has a reservoir volume of 6.5 million cubic metres of water. These are sufficient for about four hours of power generation. Photo: Jan Woitas/dpa-Zentralbild/dpa

04 June 2019, Saxony, Markersbach: The upper reservoir of the Markersbach pumped storage power plant, recorded with a drone. The pumped storage plant was commissioned in 1979 and, with an installed capacity of 1,050 megawatts, is the second largest pumped storage power plant in Germany. The upper basin on the hilltop of the Hundsmarter at about 850 metres above sea level has a reservoir volume of 6.5 million cubic metres of water. These are sufficient for about four hours of power generation. Photo: Jan Woitas/dpa-Zentralbild/ZB