Intermittent rain led to a rapid improvement in Delhi's air quality on Friday and cleared the suffocating haze that had been lingering for more than 10 days. "It is very important that Delhi-NCR has received rain today. Last time, the rainfall was recorded on October 16...Because of the rain, the pollutants or polluting particles in atmosphere have got suspended because of the "scavenging action" by rainfall which has cleaned the environment," India Meteorological Department chief Dr M Mohapatra told NDTV. He further added that the the rain is mainly because of the western disturbance.