Smog to blame for Hà Nội’s recent bad air quality stockbot 0 161 2021.12.16 00:45 http://vietnamnews.vn/society/1106703/smog-to-blame-for-ha-nois-recent… + 6 https://vietnamnews.vn/rss/society.rss + 0 Many northern localities register bad Air Quality Index (AQI) scores on December 15