The Ministry of Environmental Protection recently announced the air quality of first half of this year. The proportion of the average number of days with good air quality in 338 prefecture-level cities and above was lower than that of the same period last year, PM2.5 concentration was flat and PM10 concentration decreased slightly.
Among them, the concentration of PM2.5 in 13 cities in the Beijing-Tianjin-Hebei region increased by 14.3% compared with the same period last year, and the concentration of PM10 increased by 13.2%.
（Source：China Environment News）
