今年上半年北京好天气同比增加13天

Core Insights - The average concentration of PM2.5 in Beijing for the first half of 2025 is reported to be 28.5 micrograms per cubic meter, reflecting a year-on-year decrease of 17.4% [1] - The number of days classified as having good air quality increased by 13 days, totaling 142 days in the same period [1] - Water ecological environment quality has improved year-on-year, while soil environmental conditions remain good, indicating a stable improvement in ecosystem quality [1]