Summary:
NEW DELHI: The air quality index (AQI) improved from 312, which is ‘very poor’ on Wednesday, to ‘poor’ at 217 on Thursday.The National Capital Region (NCR), too, saw cleaner but ‘poor’ air day. The IMD has predicted the air quality till November 19 will be between ‘poor’ and ‘very poor’.Earlier, in one of the most dramatic deterioration in the city’s air quality, Delhi saw one of its most polluted days of the season on November 5, just 24 hours after having recorded the cleanest air in November in at least three years. Gurugram was the cleanest at 162.”According to System of Air Quality and Weather Forecasting and Research ( SAFAR ), air quality improved significantly due to sufficient rainfall on Wednesday night and its wash away effect.“The surface wind speed moderately increased, but pollution level declined faster than expected. This implies that air is lighter and free path increased to allow faster dispersion. In addition to cleaning by rain, it also tends to suggest that accumulative emission loading is relatively less..