… improvement of urban air quality took place while country-scale emissions of SO 2 were …
It has also been excessively brief on developments over the last two decades during which …

… 2.5 levels observed at urban air quality monitoring stations. The … annual trends in national
emissions of main air pollutants in … short-term air pollutants changes over the last 2 decades, …

… China has undergone unprecedented urbanization over the past few decades and … Computer
simulation results also indicate that more compact cities improve urban air quality but are …

… national air quality ground observation database, with data from more than 300 cities from …
of the characteristics and temporal trends of air pollution over the 7 classified regions in China…

… Social urbanization, in contrast, presented the opposite trend. Additionally, … urban air
pollution in upper-middle-income countries, economic development can improve urban air quality…

… Previous studies of global urban air pollution have not considered trends in air pollutant …
We aimed to estimate trends in fine particulate matter (PM 2·5 ) concentrations and …

… of lockdowns on urban air pollution. They have … the trends seen for Chinese cities might be
attributed to the abatement of precursor emissions more than to regional meteorology trends. …

… This paper develops an initial global vision on policy interventions … air quality guideline
value in the next few decades. The analysis takes a holistic perspective, connecting past trends of …

… to address air pollution and the related burden of disease. Here, trends in global air quality
… in the context of attempts to reduce air pollution, both through long-term policies and more …

… In the case of other Asian countries, air pollutant emissions generally showed an increase
along with economic growth and motorization. Trends and spatial distribution of air pollutants …