In contrast, the limit values for ozone pollution were exceeded in Berlin in 2022. "For the irritant gas ozone, the pollution was significantly higher than in 2021," it said. Due to the very sunny and hot weather, the mean values in Friedrichshagen at Müggelsee, for example, were above the limit value on 27 days - the target value provides for a maximum of 25 exceedances. Ozone can lead to reduced lung function, inflammatory reactions in the respiratory tract and respiratory complaints in humans. Particulate matter and nitrogen dioxide can also lead to illnesses.