Noida schools shut till Nov 5 as AQI worsens

The Gautam Buddh Nagar administration said the decision has been taken as the levels of particulate matter 2.5 and 10 have been excessive in the air since Diwali, resulting in a major dip in the overall air quality.

from Times of India https://timesofindia.indiatimes.com/india/schools-in-noida-greater-noida-shut-till-nov-5-due-to-rising-pollution/articleshow/71875079.cms