Among the world's 10 most polluted cities, 3 are from India

Delhi tops the list with an average AQI ( Air Quality Index ) of 556, Kolkata ranks fourth and Mumbai takes sixth place in the entire list. The cities with the worst AQI indices also include Lahore (Pakistan) and Chengdu (China).

Among the world's 10 most polluted cities, 3 are from India

The air quality and pollution city tracking service from IQAir, a Switzerland-based climate group that is also a technology partner of the United Nations Environmental Program, has reported that there are three cities from India in the list of top ten cities with the worst air quality indices.

Delhi tops the list with an average AQI ( Air Quality Index ) of 556, Kolkata ranks fourth and Mumbai takes sixth place in the entire list. The cities with the worst AQI indices also include Lahore (Pakistan) and Chengdu (China).