VOV.VN - Air quality across the capital city of Hanoi deteriorated into poor and unhealthy levels on February 6, with several monitoring stations recording hazardous readings, prompting health warnings from experts and authorities.

VOV.VN - The air quality in the capital on November 22 exceeded the red-warning level, reaching purple, meaning that the air quality of the local atmosphere has reached a very unhealthy level for local residents.

VOV.VN - "Unhealthy" levels of air pollution have been recorded in Hanoi over the past few days and are set to continue over the coming days in the build up to Tet or the Lunar New Year festival, the biggest of its kind in Vietnam.

VOV.VN - Air quality in the capital was recorded at very unhealthy levels on January 5, exemplified by a thick haze that has blanketed the city.

VOV.VN - The capital of Vietnam has been choked on unprecedentedly poisonous air over recent days with the air quality index (AQI) monitored at most sensor stations reaching an unhealthy level, even falling to a hazardous level in some places.

VOV.VN - The air quality in Hanoi sharply declined on the morning of March 8 to reach extremely unhealthy levels, exemplified by a thick layer of haze that is currently blanketing the capital.