Hanoi Ranks Second in Global Air Pollution

On March 21, 2025, Hanoi was reported as the second most polluted city in the world. According to IQAir, the city's Air Quality Index (AQI) reached 223,

"very unhealthy" conditions.

Several areas experienced

air pollution, including the area in front of Hanoi University of Science and Technology on Giai Phong Street, which "very unhealthy" levels in the morning. Other locations, such as Nguyen Van Cu Street and Nhan Chinh Park, also had "unhealthy" air quality.

Health experts advise people, especially those with

, to limit outdoor activities and wear . To improve air quality, Hanoi’s authorities are , , and .