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 German reunification, the border became part of the eastern border of the European Community, then that of the European Union. For a period, it was "the most heavily policed border in Europe". After Poland joined the European Union in 2004, the border controls were relaxed in agreement with the Schengen Agreement to eliminate passport controls by 2007. The modern borderlands of Poland and Germany are inhabited by about one million of those countries' citizens within the counties on each side. Germany–Poland border The Germany–Poland border (, ), the state border between Poland and Germany, is currently the Oder–Neisse line. It