上半年我国生态环境质量总体持续改善

Air Quality - The average proportion of days with good air quality in 339 cities at or above the prefecture level is 83.8%, an increase of 1 percentage point year-on-year [1] - The average concentration of PM2.5 nationwide is 32.1 micrograms per cubic meter, a decrease of 2.4% year-on-year [1] Water Quality - Among 3,641 national surface water assessment sections, the proportion of sections with good water quality (Class I-III) is 89%, an increase of 0.2 percentage points year-on-year [1] - The proportion of good water quality sections in major river basins, including the Yangtze, Yellow, Pearl, Songhua, Huai, Hai, and Liao rivers, is 90.4%, an increase of 0.1 percentage points year-on-year [1]