Near Krefeld Greenpeace activists carry out a 24 hour measurement with special built equipment - the Manta trawler - on inflatables.
Greenpeace with its ship Beluga II investigates microplastics pollution on the river Rhine in Germany, between Duisburg and Koblenz. Scientists take water and sediment samples, which are filtered and the microplastics elements found are analyzed for their chemical composition in the laboratory of the ship.