The night of Diwali on October 20 saw intense fireworks and firecrackers , leading to a significant deterioration in Delhi’s air quality. The Air Quality Index ( AQI ) has crossed the hazardous threshold of 400, resulting in persistent smog covering the city for two days. This severe pollution has affected the weather, making it feel strange and unsettling.

Science and medical research indicate that poor air quality has a profound impact on mental well-being. When the AQI exceeds 400, pollutants such as PM2.5, NO₂, and O₃ mix in the air in substantial amounts, causing inflammation in the brain and damaging cells. These pollutants can travel through the bloodstream, reaching the brain and affecting mood and brain functions.

High AQI levels disrupt brain chemicals like serotonin and

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