12 NCR cities among world’s 25 most polluted in 2021
The dismal picture of air pollution in Delhi-NCR has been captured in a world air quality pollution report compiled by a Swiss firm, IQAir. A total of 12 NCR cities, including Delhi, Noida, Ghaziabad and Gurugram, are among the 25 most polluted places in the world, according to the survey that compared last year’s data with that of 2020.