World Air Quality Report 2021: Delhi tops the list, Hyderabad among top 4
While, the top three were already known pollution hubs, Hyderabad's entry in the list raises concern as it is now most polluted mega city in the southern part of the country.
While, the top three were already known pollution hubs, Hyderabad's entry in the list raises concern as it is now most polluted mega city in the southern part of the country.
