"Wasserverschmutzung." . . "Oil pollution of rivers, harbors, etc." . . "Oil in troubled waters"@en . . . . . . . . . "Discusses how oil seeps into the world's waters, the methods used to clean up such spills, and possible ways to prevent spills of varying size."@en . "Discusses how oil seeps into the world's waters, the methods used to clean up such spills, and possible ways to prevent spills of varying size." . . . . . . "Oil in troubled waters" . "Erdöl." . . "Meeresverschmutzung." . . . . "Oil spills Environmental aspects." . .