![The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy](https://c8.alamy.com/comp/DFKMJF/the-first-smog-alert-in-the-area-the-towns-essen-and-dortmund-were-DFKMJF.jpg)
The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy
![The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy](https://c8.alamy.com/comp/DFKMH3/the-first-smog-alert-in-the-area-the-towns-essen-and-dortmund-were-DFKMH3.jpg)
The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy
![The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy](https://c8.alamy.com/zooms/6/22172c4de13e4c6b88b9ad9e52e96f9e/t7ddwj.jpg)
The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy
![The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy](https://c8.alamy.com/comp/DFKMJ8/the-first-smog-alert-in-the-area-the-towns-essen-and-dortmund-were-DFKMJ8.jpg)
The first smog alert in the area the towns Essen and Dortmund were completely blocked in the inner city area for traffic about 28 years ago | Stock Photo - Alamy
![Dortmund, January 18, 1985. Smog alarm in the Ruhr area. Roadblock prohibits the exit on the B1 in the city center of Dortmund. In the Federal Republic of Germany for the first Dortmund, January 18, 1985. Smog alarm in the Ruhr area. Roadblock prohibits the exit on the B1 in the city center of Dortmund. In the Federal Republic of Germany for the first](https://c8.alamy.com/comp/T7DDXJ/dortmund-january-18-1985-smog-alarm-in-the-ruhr-area-roadblock-prohibits-the-exit-on-the-b1-in-the-city-center-of-dortmund-in-the-federal-republic-of-germany-for-the-first-time-smog-alarm-level-iii-is-called-above-all-the-western-ruhr-area-is-affected-stage-iii-of-the-smog-regulation-imposed-an-absolute-ban-on-driving-private-cars-dortmund-18-januar-1985-smog-alarm-im-ruhrgebiet-schild-verbietet-die-ausfahrt-an-der-b1-in-die-innenstadt-von-dortmund-in-der-bundesrepublik-wird-erstmals-smog-alarm-der-stufe-iii-ausgerufen-betroffen-ist-vor-allem-das-westliche-ruhrgebiet-mi-T7DDXJ.jpg)
Dortmund, January 18, 1985. Smog alarm in the Ruhr area. Roadblock prohibits the exit on the B1 in the city center of Dortmund. In the Federal Republic of Germany for the first
![Dortmund, Germany, January 18th 1985. Smog alarm in the Ruhr area. Sign prohibits the exit on the B1 in the city center of Dortmund. In the Federal Republic of Germany for the Dortmund, Germany, January 18th 1985. Smog alarm in the Ruhr area. Sign prohibits the exit on the B1 in the city center of Dortmund. In the Federal Republic of Germany for the](https://c8.alamy.com/comp/T7DDX0/dortmund-germany-january-18th-1985-smog-alarm-in-the-ruhr-area-sign-prohibits-the-exit-on-the-b1-in-the-city-center-of-dortmund-in-the-federal-republic-of-germany-for-the-first-time-smog-alarm-level-iii-is-called-above-all-the-western-ruhr-area-is-affected-stage-iii-of-the-smog-regulation-imposed-an-absolute-ban-on-driving-private-cars-dortmund-18-januar-1985-smog-alarm-im-ruhrgebiet-schild-verbietet-die-ausfahrt-an-der-b1-in-die-innenstadt-von-dortmund-in-der-bundesrepublik-wird-erstmals-smog-alarm-der-stufe-iii-ausgerufen-betroffen-ist-vor-allem-das-westliche-ruhrgebie-T7DDX0.jpg)