Helsinki Convention on the Protection of the Marine Environment of the Baltic Sea Area Finland, Germany, Latvia, Lithuania, Poland, Russia and Sweden. The Convention on the Protection of the Marine Environment of the Baltic Sea Area, 1992, entered into force on 17 January 2000. The States-Parties to the Convention agreed individually or jointly to take all appropriate legislative, administrative or other relevant measures to prevent and eliminate pollution in order to promote the ecological restoration of the Baltic Sea Area and the preservation of its ecological balance. The Parties undertake to apply: The aim of the States-Parties to the Convention is to prevent and eliminate pollution of the marine environment of the Baltic Sea
Germany–Poland border the Slavic tribes. Over several centuries, it has moved eastwards, stabilized in the 14th century, and disappeared in the late 18th century with the partitions of Poland, in which Poland's neighbors, including the Kingdom of Prussia, annexed all of its territory. In 1871 Prussia became part of the German Empire. After Poland regained independence following World War I and the 123 years of partitions, a long German-Polish border was settled on, long (including a border with East Prussia). The border was partially shaped by the Treaty of Versailles and partially by plebiscites (East Prussian plebiscite and the Silesian plebiscite, the