India accounts for seven of the world's 10 cities with the worst air pollution, according to a new report, but previously smogbound Chinese cities have seen a marked improvement.

Gurugram, a suburb of the Indian capital New Delhi, is the world's most polluted city, according to Greenpeace and AirVisual, which found it had an average air quality index of 135.8 in 2018 -- almost three times the level which the US Environmental Protection Agency regards as healthy.

In two months of last year, the AQI in Gurugram -- as measured by levels of fine particulate matter known as PM 2.5 -- was above 200.
 
According to the report, air pollution will cause around 7 million premature deaths globally next year and have a major economic impact.

The problem is particularly pronounced in South Asia. Eighteen of the world's top 20 most polluted cities are in India, Pakistan or Bangladesh, including the major population centers of Lahore, Delhi and Dhaka, which placed 10th, 11th and 17th respectively last year.

While South Asian countries, along with China, are the worst affected, air pollution is a global issue.

Of the 3,000 cities measured in the report, 64% exceeded the World Health Organization's annual exposure guidelines for PM2.5.

Every single city included in the report in the Middle East and Africa exceeded WHO guidelines for PM2.5, as did 99% of cities in South Asia, 95% in Southeast Asia, and 89% in East Asia.

While China saw improvement, however, many neighboring countries suffered major increases in pollution, including in Indonesia, South Korea, Vietnam and Thailand.

Source: CNN

BDST: 1901 HRS, MAR 5, 2019
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