Diesel ban. Traffic sign prohibiting the use of diesel and gasoline vehicles and permitting the use of e-cars only (in German Stock Vector Image & Art - Alamy
Diesel cars can be banned from German cities, court rules | Mint
Merkel, Vulnerable on Diesel in Germany, Moves to Address Issue - The New York Times
Viewfinder: Protest Against Diesel Cars in Germany - Pacific Standard
Germany backs retrofits as a way to avert diesel bans | Automotive News Europe