Low emission zones

Most of the more than 30 German environmental zones were applied from 1 January 2013 for vehicles with a green sticker. In 4 environmental zones, including the Ruhr, it ran in the current year 2013, with the yellow badge. 

New motor caravans and the vast majority of automobiles fulfill these requirements. For many older motor caravans retrofit solutions are ready to be financed by the state. 

 

Overview of the low emission zones in Germany

http://gis.uba.de/website/umweltzonen/index_engl.html