Saturday, December 12, 2020, 10:09 GMT+7
Hanoi is engulfed in grey haze in this photo taken on December 10. Photo: Pham Tuan / Tuoi Tre
Visible indications of air quality deterioration were reported in Hanoi on Thursday as the city was engulfed in thick clouds of smoke.
The Air Quality Index (AQI) in downtown Hanoi reached an unhealthy level on Thursday morning, according to air quality monitoring stations operated by the Environmental Protection Agency under the Department of Natural Resources and Environment.
Meanwhile, several monitoring stations in suburban Hanoi reported “moderate” air quality.
An AQI readout between 101 and 150 indicates “unhealthy” air quality for sensitive groups, while anything falling between 51 and 100 means “moderate” in terms of air pollution.