感知生态之变丨蓝天常在 大气污染治理跑出中国加速度

Group 1 - The core viewpoint emphasizes the significant improvement in air quality in China, particularly since the 18th National Congress, leading to a tangible increase in public happiness and well-being [2][5] - The steel industry exemplifies the broader changes in air quality, showcasing the success of the "Blue Sky Defense War" [4] - Since 2013, the number of heavily polluted days has decreased by over 90%, making China the fastest country in the world to improve air quality [5] Group 2 - The transformation of air quality is evident in the reduction of unpleasant odors, with a notable decline in PM10 and other harmful pollutants over the past decade [8][12] - A sophisticated air quality monitoring network in Beijing integrates data from various sources, enabling precise governance and management of air quality [10] - The annual average concentration of PM2.5 in Beijing has dropped from nearly 90 micrograms per cubic meter to 30.5 micrograms, with a nearly 40% reduction in PM2.5 levels across 339 cities [12] Group 3 - The visibility of blue skies has increased, with an average of 22 more blue sky days per city over the past decade, and the number of stargazing spots has increased twentyfold since 2016 [14] - Public perception of air quality has shifted, with residents now appreciating the beauty of the sky and natural scenery rather than merely noticing the absence of smog [16]