Delhi, Kolkata, Mumbai among world’s top 10 polluted cities

Of the world’s top 10 cities with the worst air quality, three – Delhi, Kolkata, and Mumbai, are in India, data from air quality and pollution city tracking service from IQAir, a Switzerland-based climate group showed.

Delhi top the list with AQI at 556, Kolkata and Mumbai recorded an AQI of 177 and 169, respectively, at 4th and 6th position. The cities with the worst AQI indices also include Lahore, Pakistan, and Chengdu, China. IQAir is also a technology partner of the UNEP.