资源环境科技发展态势分析平台

The German Environment Agency has published the final data for 2019 on nitrogen dioxide (NO2). The data show that only 25 cities exceeded the annual mean NO2 limit value of 40 micrograms NO2 per cubic metre of air (µg/m³), compared to 57 cities in the previous year. Preliminary data for 2020 already points to further reductions of NO2 pollution by up to 40 percent in the wake of the coronavirus pandemic. It remains to be seen how overall air quality will improve in 2020.