 "Silhouette of children seen through a layer of dense fog on a cold, winter morning, in New Delhi, Sunday")
Delhi's air on Sunday recorded its second worst day of 2018, as authorities said pollution will be "severe" for the next couple of days because of the weather.
The Central Pollution Control Board’s (CPCB) data showed the overall air quality index (AQI) to be "severe" level of 446. System of Air Quality and Weather Forecasting (SAFAR), another government-run monitor, showed the air was worse at 471.
AQI touched 571 in Delhi on November 8, a day after Diwali and the worst this year. An AQI between 100 to 200 comes under the 'moderate' category, 201 and 300 is considered 'poor', 301 and
