Analysis of data for 50 metropolitan cities for 2016, 2017 and 2018 showed a declining trend in Delhi, Varanasi, Ranchi, Raipur, Vijayawada and Bengaluru, among others, whereas the level of PM10 rose in Surat, Vadodara, Rajkot (all in Gujarat), Jodhpur, Kota (both in Rajasthan), Gwalior and Jabalpur (MP).
