Left-hand panels a, b, and c show the annual average, summer average

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Satellite-based summertime Ω NO2 (blue dots), Ω HCHO (green dots)

Time series of hourly concentrations of PM 2.5 , PM 10 , SO 2 , CO, NO

Graphic: Temperature vs Solar Activity

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Seasonal variations of six pollutants in whole China (CHN) and five

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Spatio-temporal variations and trends of major air pollutants in China during 2015–2018

Percentage of days during 1999–2010 with any of the eight harmful

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Health effect estimates of each pollutant mixture type, from high total

Time series of hourly concentrations of PM 2.5 , PM 10 , SO 2 , CO, NO

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Comparison of AOD measured by the MAX-DOAS and sun photometer. The

a) Geopotential heights and (b) the mean sea level pressures with wind