8hrs (10pm to 6am) of Diwali night #AirPollution (Fig 1). Over half a billion people enjoying #DiwaliCelebration & #CrackerBan in central & north India last night. South India has a day earlier (visible by their levels!). Last 4 hrs (2 to 6am) PM2.5 levels dropping. #HappyDiwali #0431tpj #chennai https://www.instagram.com/p/Bp7YudIl3FB/?utm_source=ig_tumblr_share&igshid=1aafb7tz0wqxq












