Some now call the Ruhr region (‘Ruhrgebiet’) Germany’s biggest slum:
(I do NOT agree on Kopp‘s general view on foreigners. And I can prove that Udo Ulfkotte is dead wrong on many things he says about foreigners.)
Original Article: Armutsquote in Duisburg und Dortmund “dramatisch” (Deutsche Wirtschafts Nachrichten, Nov 14, 2012)
Google translation: Poverty rate in Duisburg and Dortmund “dramatic” (Deutsche Wirtschafts Nachrichten, Nov 14, 2012)