The Mittelplatte oil platform has long been a thorn in the side of conservationists: Surrounded by the Schleswig-Holstein Wadden Sea National Park, within sight of the bird sanctuary island of Trischen, crude oil has been extracted since 1987, initially by ship and now transported ashore via a pipeline. Extraction in the national park is permitted because the platform was approved before the national park was established. After earlier lawsuits against the oil extraction were unsuccessful, Deutsche Umwelthilfe (DUH) is now making a new attempt to stop it legally.