The statements in Chapter 4 - Clean Air - are based amongst others on two reports, worked out by IVU Umwelt, commissioned by the German Federal Environmental Agency (UBA):
Diegmann, V., Pfäfflin, F., Wursthorn, H. (2007a): Updated inventory of Clean Air Plans and Action Plans in Germany. Final report. Freiburg: IVU Umwelt GmbH.
Diegmann, V., Pfäfflin, F., Wiegand, G., Wursthorn, H., Dünnebeil, F., Helms, H., Lambrecht, U. (2007b): Measures to reduce particulate matter and nitrogen dioxide. Dessau: German Federal Environmental Agency (UBA).
The German Advisory Council on the Environment (SRU), established in 1971, is an expert advisory body whose mission is to describe and assess the current environmental situation and current environmental trends, as well as to point out environmental problems and suggest possible ways and means of preventing or correcting them.
Download Summary - Environmental Report 2008 http://www.umweltrat.de/english/edownloa/envirrep/UG_2008_summary.pdf