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    Online Classes, Construction Ban as Toxic Haze Engulfs Delhi

    1 month ago

    Delhi and its surrounding regions have shifted schools to online mode and halted construction activity after air pollution levels rose sharply, pushing air quality into the “severe” category.

    A dense layer of smog covered the national capital on Monday morning, reducing visibility and causing delays to flight and train services. The city’s air quality index (AQI) surged to extremely high levels, with PM2.5 concentrations far exceeding limits considered safe by global health standards. Such exposure poses serious health risks, particularly for children, the elderly, and people with existing respiratory or heart conditions.

    Air pollution worsens in Delhi every winter due to a combination of factors including vehicle emissions, industrial activity, falling temperatures, low wind speeds, and seasonal crop residue burning in neighbouring states. According to the government’s SAFAR monitoring system, the average AQI in the city early Monday stood at 471, which falls under the “severe” category.

    India’s pollution monitoring framework classifies AQI readings between 101–200 as moderate, 201–300 as poor, 301–400 as very poor, and above 400 as severe. While official systems cap readings at 500, independent monitors often record even higher levels during peak pollution episodes.

    The recent spike follows a brief improvement last week, when air quality fluctuated between poor and very poor. Authorities attributed the sudden deterioration to increased moisture in the air and a change in wind patterns, which reduced the dispersion of pollutants and intensified smog formation.

    On Sunday, the Commission for Air Quality Management (CAQM) activated the highest stage of its Graded Response Action Plan (GRAP). Under these measures, construction work has been suspended, older diesel trucks have been restricted from entering the city, and schools have been directed to operate in hybrid mode, with younger students attending classes online. Courts have also advised virtual hearings where possible.

    Health officials have urged residents to limit outdoor activities, use masks when stepping out, and remain indoors as much as possible. Prolonged exposure to severe pollution levels can lead to respiratory issues even among otherwise healthy individuals.

     

    Government data presented to Parliament earlier this month showed that more than 200,000 cases of acute respiratory illnesses were reported in six state-run hospitals in Delhi between 2022 and 2024, highlighting the growing health impact of persistent air pollution in the capital.

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