
India is home to 18 of the 20 cities with the most severe increase in fine particle pollutants (PM2.5) from 2010 to 2019, according to a comprehensive and detailed analysis of air pollution and global health effects for over 7,000 cities released on Wednesday. The report published by the US-based research organisation Health Effects Institute (HEI) also shows that Delhi has the highest average level of fine PM 2.5 among the world’s most populated cities.