Hanoi declared world’s most polluted city, authorities seek action

Vietnam’s capital Hanoi has been covered in thick smog over recent weeks, putting it at the top of a list of the world’s most polluted cities, as the government said it would push for more electric vehicles (EVs) to alleviate the problem.

Levels of hazardous small particles, known as PM2.5, were measured at 266 micrograms per cubic metre in Hanoi early on Friday, the highest reading among a list of most-polluted cities, according to AirVisual, which provides independent global air pollution information via a phone app.

The Southeast Asian country, a regional manufacturing hub with one of the fastest-growing economies in Asia, has reported severe air pollution in its major cities for years, particularly in Hanoi.