Twelve other cities in the top 20 are in India. Its capital New Delhi featured as the world’s most polluted capital for the sixth consecutive year, with a PM2.5 concentration of 91.8.

Japan alone had three cities on the list, including the runner-up, Tokyo, a perennial favorite for the sheer breadth of things to do in this megalopolis of around 14 million.

More Asian cities, which make up about half of the world’s most populous capitals, saw some of the biggest temperature increases – a trend that’s evident in recent heat waves across the ...

Vietnam's capital Hanoi ranked 31st in a global ranking of world's best cities at the Telegraph Travel Awards 2025, ...