生态环境部：上半年我国空气和地表水环境质量总体改善

Core Viewpoint - The overall air and surface water quality in China has improved in the first half of the year, as reported by the Ministry of Ecology and Environment [1] Air Quality - In the first half of the year, the average proportion of days with good air quality in 339 cities at or above the prefecture level was 83.8%, an increase of 1 percentage point year-on-year [1] - The average concentration of PM2.5 nationwide was 32.1 micrograms per cubic meter, a decrease of 2.4% compared to the same period last year [1] Surface Water Quality - The report indicates a general trend of improvement in surface water quality, although specific numerical data was not provided in the document [1]