Background concentration of atmospheric PM2.5 in the Beijing–Tianjin–Hebei urban agglomeration: Levels, variation trends, and influences of meteorology and emission
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Li Chen | Shuang Gao | Hui Zhang | Yanling Sun | Jian Mao | Z. Bai | Hongyan Zhao | M. Azzi | Wen Yang | Jie Yu | Fangyu Qu