Air quality improves, but Gurgaon still more polluted than Delhi, Noida [http://cmsenvis.cmsindia.org/resources/newspaper/details.asp?id=93029]GURUGRAM: The level of PM2.5 in the city dropped by nearly 36% on Thursday as compared to Wednesday but despite the fall in the pollution level, Gurgaon continued to be more polluted than Delhi and Noida.