Delhi’s air quality marginally improved on Wednesday morning as it slipped to ‘poor’ category. The Air Quality Index (AQI) in the city (overall) read 235 at 7.40 am. According to System of Air Quality and Weather Forecasting And Research (SAFAR), the level of PM 2.5 and PM 10 in the air at 7.40 am stood at ‘poor’ and ‘moderate’ levels, respectively.

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