A German court ruled on Thursday that the western city of Cologne must introduce bans on older diesel vehicles in certain areas from April 2019 and the nearby city of Bonn must impose bans on diesel vehicles for two roads at the same time.
Environmental lobby group DUH had filed complaints against the state of North Rhine-Westphalia, home to Cologne and Bonn, saying the cities needed to ensure their nitrogen dioxide (NO2) levels stuck to permitted limits and calling for a ban of diesel vehicles in those cities.