ht“Half of the most polluted cities in India are in Uttar Pradesh with Allahabad ranked as worst, the Central Pollution Control Board air quality data of the 46 million cities showed.
Delhi ranks fourth for the average annual particulate matter pollution in 2016, 19% deterioration since 2014. Other cities are Jaipur, Dhanbad, Ranchi and Amritsar.
The worrying trend emerging from the data was that air pollution was rising at a rapid pace in most of the big cites except Raipur, Kolkata and Indore, where it has gone down slightly because of proactive action by local bodies.” Hindustan Times

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Air pollution choking India, UP home to 5 most polluted cities in the country