![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
![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
Slg. Helmut Orwat: Das Ruhrgebiet und Westfalen in den 1950er bis 1990er Jahren - Bildarchiv / Bilddatenbank LWL-Medienzentrum für Westfalen
![Dortmund, 18. Januar 1985. Smog-Alarm im Ruhrgebiet. Strassensperre verbietet die Ausfahrt an der B1 Dortmund, 18. Januar 1985. Smog-Alarm im Ruhrgebiet. Strassensperre verbietet die Ausfahrt an der B1](https://cdn.imago-images.de/bild/st/0091124918/m.jpg)
Dortmund, 18. Januar 1985. Smog-Alarm im Ruhrgebiet. Strassensperre verbietet die Ausfahrt an der B1
![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)
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
![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://l450v.alamy.com/450v/dfkmk5/the-first-smog-alert-in-the-area-the-towns-essen-and-dortmund-were-dfkmk5.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/6/0365b935c92746d3909bf490e2dd3e08/t7de27.jpg)