Air quality in Indian cities is worsening fast and is today poorer than the situation in China. Based on WHO Report (2018) on the global ambient air quality database, 11 of the 12 cities in India are having highest levels of small particulate – PM2.5. Excessive exposure to PM2.5 causes irritation in the eyes, nose, and throat, coughing, sneezing, and shortness of breath, and can cause permanent respiratory problems such as asthma, chronic bronchitis, and heart disease. According to a study by the University of Chicago on the Air Quality Life Index (AQLI), pollution in Delhi in 2016 reduced life expectancy by more than 10 years.