All but one of the world’s top 20 most polluted cities last year were in Asia, a new study shows. The majority of these cities – 13 – are in the world’s most populous country, India, where booming economic growth is fired largely by coal and where hundreds of millions live in traffic-clogged and congested megacities .

IQAir latest study shows 19 of 20 cities with worst air pollution are in India, Pakistan, Bangladesh, China, and Kazakhstan

The most polluted cities in the world last year have been revealed in a new study, with countries in Asia dominating the top 10, a new study suggests.