Smog covers sky as air quality at ‘very unhealthy’ level in Hanoi
The air quality index was measured at more than 200 in several locations
Hanoi’s air pollution reaches 'very unhealthy' level
The Air Quality Index recorded in Hanoi on Tuesday indicated a 'very high' level of pollution
Vietnamese authorities announce root cause of air pollution in Hanoi, Ho Chi Minh City
A sharp decline of air quality in Hanoi was recorded
Authorities remain silent amidst terrible air pollution in Hanoi
Average AQI in Hanoi was measured att 256 on the morning of December 13
Vietnamese people resort to portable oxygen cylinders for respite from smog
Air quality in Hanoi and Ho Chi Minh City has been on a serious decline since September
Hanoi’s air pollution reaches worst level since year-start
‘This is the first time I’ve seen such hazardous air quality in Hanoi’
Vietnam teacher apologizes after igniting smear campaign against AirVisual
'I regret that my negative comments about AirVisual has affected and obstructed the app’s operations in Vietnam'
AirVisual says targeted by ‘coordinated campaign’ to discredit it in Vietnam
AirVisual has been accused of manipulating its data in order to sell air purifiers
Air quality app AirVisual ‘gone’ from app stores in Vietnam amidst choking pollution
AirVisual’s data have been frequently cited by Vietnamese news outlets in recent weeks as air quality in Vietnam’s two largest cities has been on a serious decline since September
Citing 'unhealthy air', Vietnam tells people to limit outdoor activities
The levels of hazardous small particles known as PM2.5 in the air at the country's two largest cities have been rising persistently since early last month