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Delhi's AQI returns to 'severe' category, schools shift to hybrid mode
456 in Ashok Vihar, 447 at DTU, 443 at ITO, 412 near Jawaharlal Nehru Stadium, and 427 at RK Puram. The capital's overall AQI stood at 401 on Monday night, a sharp spike from 294 on Sunday and 193 on ...