Pollution in the Vietnamese capital of Hanoi, home to almost 9 million people, reflects the environmental cost of the Southeast Asian nation’s explosive growth.

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 ...

HONG KONG — Six out the world’s 10 most polluted cities are in India, while California has the worst air pollution in North America, a new report shows.. New Delhi was the most polluted ...

All 20 of the world’s most polluted cities last year exceeded WHO PM2.5 guidelines by over 10 times, the IQ Air report showed. Data gaps Vehicles drive amid high levels of air pollution in Hanoi ...

Six out the world’s 10 most polluted cities are in India, while California has the worst air pollution in North America, a new report shows.. New Delhi was the most polluted capital city ...

All but one of the world’s top 20 most polluted cities last year were in Asia, a new study shows. The list of the world’s top 20 most polluted cities is out. All but one are in Asia ...

All 20 of the world’s most polluted cities last year exceeded WHO PM2.5 guidelines by over 10 times, the IQ Air report showed. Data gaps ...

All 20 of the world’s most polluted cities last year exceeded WHO PM2.5 guidelines by over 10 times, the IQ Air report showed. Data gaps ...

By Rhea Mogul, CNN (CNN) — 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 ...