group1.term224 Class2.2 thg 42 phút đọcHanoi sees zero days of good air quality in MarchBy Phan Anh April 2, 2024 | 05:00 pm GMT+7 Smog in Hanoi's Cau Giay District on Nov. 16, 2021. Photo by VnExpress/Ngoc Thanh Hanoi...