title: [Sources, emissions and trends in air pollutants in concentrated areas--the Ruhr district].
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000397:Air Pollution / Q000517:prevention & control*; D001194:Asbestos / Q000032:analysis; D001554:Benzene / Q000032:analysis; D001564:Benzo(a)pyrene / Q000032:analysis; D004391:Dust / Q000517:prevention & control; D005860:Germany, West; D006801:Humans; D008452:Maximum Allowable Concentration; D008670:Metals / Q000032:analysis; D009585:Nitrogen Dioxide / Q000032:analysis; D010100:Oxygen / Q000032:analysis; D010126:Ozone / Q000032:analysis; D012905:Smog / Q000517:prevention & control; D013458:Sulfur Dioxide / Q000032:analysis
chemical_list: D000393:Air Pollutants; D004391:Dust; D008670:Metals; D012905:Smog; D013458:Sulfur Dioxide; D001194:Asbestos; D001564:Benzo(a)pyrene; D010126:Ozone; D001554:Benzene; D009585:Nitrogen Dioxide; D010100:Oxygen
vernacular_title: Quellen, Immissionen und Trends von Luftverunreinigungen in Ballungsgebieten--Ruhrgebiet.