Figure 1. 
Annual Average Fine Particulate Pollution Concentration in Chinese Cities at the Prefecture Level and Above, 2016

Annual Average Fine Particulate Pollution Concentration in Chinese Cities at the Prefecture Level and Above, 2016

AQG = World Health Organization's Air Quality Guidelines, AQS = ambient air quality standard, IT = World Health Organization's Air Quality Interim Target, PM2.5 = particulates with aerodynamic diameter ≤2.5 μm, PRC = People's Republic of China.

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