A thick blanket of smog engulfed Delhi-NCR on Tuesday morning, with the Air Quality Index ( AQI ) once again slipping into the “hazardous” category after Diwali celebrations. According to real-time monitoring, India’s PM2.5 level stood at 81 µg/m³ and PM10 at 142 µg/m³, putting air quality firmly in the hazardous zone.

Doctors and environmentalists are calling it a “wake-up call” for residents, warning that even short exposure can cause harmful effects, particularly for children, the elderly and those with existing health conditions.

What Are PM2.5 and PM10 — And Why They Are Dangerous

Particulate matter (PM) refers to fine inhalable particles present in polluted air. PM10 includes larger coarse particles, while PM2.5 represents tiny, microscopic particles that can penetrate deep in

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