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HANOI, April 18 (Xinhua) The northern region of Vietnam continued to experience poor air quality as of Tuesday morning, with private air quality network PAM
PAM Air monitoring stations in Cẩm Xá Commune, Mỹ Hào District, Hưng Yên Province, reported that the Air Quality Index (AQI) exceeded the red-warning level, peaking at AQI 312.