India, Oct. 17 -- Delhi air has begun its winter slump as the quality remained poor for fourth consecutive day this week with an Air Quality Index (AQI) of 242 on Friday morning. On Thursday, the 24-hour average AQI (Air Quality Index) for Delhi was recorded at 245, placing it firmly in the 'poor' category, according to official data.

However, limited areas also witnessed air in the 'very poor' category, with the AQI surpassing the 301-mark.

Transport emissions remained the largest contributor to Delhi's air pollution on Thursday, accounting for 18.7 per cent of total emissions, based on data from the Decision Support System. No respite is expected as the Air Quality Early Warning System forecast shows similar air quality for the coming...