Traffic moves along the busy western express highway in Mumbai, India, 09 January 2024. Mumbai is facing severe air pollution due to ongoing construction work, including Metro projects, building construction, bridges, road maintenance, as well as vehicular traffic and with climate change. Mumbai's air quality index (AQI) stood at 153, which lies in the 'poor' category, already considered 'unhealthy' for sensitive groups, according to the Central Pollution Control Board.