Delhi air quality fluctuates between 'Very Poor' and 'Severe'; AQI at 318

Delhi's air quality showed slight improvement on Sunday, moving from "severe" to "very poor" with an AQI of 318. This improvement follows a week of hazardous air quality, peaking at 495 last Monday. Vehicular emissions and stubble burning were identified as major contributors to the pollution. Despite the improvement, visibility remained low due to mist and smog.