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京津冀三地的细颗粒物（PM2.5）年均浓度在过去十年中显著下降，与2013年相比降幅达到了六成左右。此外，重污染天数的大幅削减和优良天数的显著增加也标志着该地区生态环境质量的显著改善。
According to a report from the Beijing生态环境微信公众号, the significant reduction in annual average concentrations of fine particulate matter (PM2.5) in the Beijing-Tianjin-Hebei region over the past decade is a testament to the region’s improved environmental quality. Compared to 2013, the decrease in PM2.5 concentrations in the three areas has been approximately 60%. Additionally, the substantial reduction in days with heavy pollution and the significant increase in days with good air quality reflect the substantial progress made in ecological and environmental protection in the region.
【来源】http://www.chinanews.com/cj/2024/02-20/10166370.shtml
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