This major city was ranked the 2nd most polluted city by IQAir on Monday due to wildfire smoke from the Prairies. Michael ...

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 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 ...

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 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 ...