The National Green Tribunal has directed chief secretaries of states with cities experiencing poor air quality to take immediate action and submit a report by November 10. The tribunal acted in response to data from the Central Pollution Control Board showing severe air pollution levels in various cities. The list of cities with poor air quality includes Navi Mumbai and Thane. In 2018, the tribunal formed a task force to monitor efforts to improve air quality in non-attained cities. The matter will be heard on Friday.