Stock Photo - 28 June 2021, Saxony-Anhalt, Magdeburg: Frank Schweikert, director of the German Ocean Foundation and captain of the research vessel ""Aldebaran"", shows sensors for measuring the water quality of the Elbe. He and his crew are on the move for four weeks to promote the information campaign ""Tracking down plastic"". With the research vessel, the scientists of the German Marine Litter Association, the German Ocean Foundation and the Balinese initiative Bye Bye Plastic Bags want to draw attention to the global plastic problem. They are sailing on the Elbe from the Czech border to the mouth of the river in the North Sea. Photo: Stephan Schulz/dpa-Zentralbild/ZB. - Magdeburg/Saxony-Anhalt/Germany