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.

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.

To identify the most polluted cities in the world, 24/7 Wall St. ranked nearly 3,000 cities worldwide based on the annual average concentration of PM2.5 per square meter of air.

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 ...

In October 2018, WHO published a list of the 10 most polluted cities in the world. Nine of the 10 cities are located in India.With its more than 21 million inhabitants, the capital New Delhi has ...

Two Indian cities joined New Delhi to become among the world's top 10 most polluted cities on Monday, with smoke heavy in the air a day after revellers let loose with firecrackers for Diwali, ...

By Helen Regan, CNN Hong Kong (CNN) — All but one of the 100 cities with the world’s worst air pollution last year were in Asia, according to a new report, with the climate crisis playing a ...

To identify the world’s most polluted cities, 24/7 Tempo reviewed the average annual concentration of PM2.5 particles in nearly 1,300 cities around the globe from the World Health Organization ...

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 ...