… background, stations with a rural background, stations in industrial locations and stations in the mountains. For the stations in the mountains, a statistically … than in the three other regions. At stations with an urban or a rural background, and in the industrial locations, the ozone concentration was at a similar level, … from 2018 onwards. Quelle: UBA (based on measuring networks of the federal states and of the federal level) Bild herunterladen (139,09 kB) … The line chart GE-I-9 …