Delhi CHOKES as Delhiites breathe toxic air again, AQI above 300 - what is the cause of air pollution?

Delhi Air Pollution: Residents of Delhi and neighbouring NCR woke up to another morning on Friday which is blanketed by a thick layer of smog. The air quality levels deteriorated to ‘very poor’ ca Delhi CHOKES as Delhiites breathe toxic air again, AQI above 300 - what is the cause of air pollution?

Delhi Air Pollution: Residents of Delhi and neighbouring NCR woke up to another morning on Friday which is blanketed by a thick layer of smog. The air quality levels deteriorated to ‘very poor’ category. As per the Central Pollution Control Board (CPCB), the overall Air Quality Index (AQI) stood at 307, at 8 am.