India, Oct. 22 -- Diwali brings joy, light, and a sense of renewal, but the days that follow tell a different story. In recent years, major metropolitan cities across the country have been shrouded in thick smog, with the AQI (Air Quality Index) often reaching the 'very poor' or 'severe' range. In the last 24 hours, the AQI in Delhi has remained in the 'very poor' range, marking yet another year of deteriorating air quality.

The combined effects of crackers, stagnant winter air, and vehicular emissions turn the festivities into a respiratory nightmare. "The tiny particulate matter (PM2.5 and PM10) in smog penetrates deep into the lungs, causing inflammation and permanent tissue damage. Over time, this reduces oxygen intake, leading to fa...