Press release 4/2017 from 31.01.2017 | Last changed: 27.03.2017
Air quality 2016: Nitrogen dioxide still the top pollutant
… station near traffic. The UBA is nevertheless concerned: The 20 µg/m 3 annual mean guideline value recommended by the World Health Organization (WHO) was exceeded at … project KLENOS has calculated that the number of days on which ozone levels exceed guideline values (days with a maximum 8-hour mean value of 120 µg/m 3 ) will …