epa10942330 An anti-smog gun blows vaporized water into the air and on the trees planted on the divider of a road, to curb air pollution, in Mumbai, India, 27 October 2023. Mumbai was rated the fifth most polluted city worldwide on 27 October by the Swiss IQAir technology company, which measures air quality in real time. Mumbai's Air Quality Index (AQI) of 156 (based on a US rating system), is already labelled 'unhealthy' by the World Health Organization (WHO). EPA/DIVYAKANT SOLANKI
