@techreport{ReutterMuellerEskenetal.2017, author = {Reutter, Oscar and M{\"u}ller, Miriam and Esken, Andrea and Fekkak, Miriam and Gr{\"o}ne, Marie-Christine and Treude, Mona and Richard, Jochen}, title = {Bericht zur Lage der Umwelt in der Metropole Ruhr 2017}, institution = {Regionalverband Ruhr}, address = {Essen}, isbn = {978-3-939234-26-5}, pages = {145}, year = {2017}, language = {de} }