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 ...

All but one of the world’s top 20 most polluted cities last year were in Asia, with the majority of these cities – 13 – in India, the world’s most populous country. Neighboring Pakistan ...

In one of the World Health Organization’s most recent global studies on air pollution, measuring so-called PM 2.5 and PM 10 particles, major Australian and Canadian cities shared the top ranks.

India was home to six of the nine most polluted global cities, IQAir said ... Ninety-nine percent of the world's population lives in areas that do not meet recommended air quality guideline ...

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 capital ...