New Delhi, Dec. 19 -- Delhi woke up to a thick blanket of toxic smog as the air quality in national capital deteriorates and visibility dropping to less than 50 metres.
According to the India Meteorological Department (IMD), very dense fog enveloped airports across the city, with visibility dropping to zero at Safdarjung and 50 metres at Palam.
At 5.30 am, the weather department forecast very dense fog over all districts of Delhi for the next two to three hours. Visibility began dropping from 3 pm on Thursday; while it stood at 800 metres under clear, bright sunshine in the afternoon, it gradually deteriorated over the next 12 hours, reaching 50 metres by 2.30 am on Friday.
Experts attributed calmer westerly winds of 4-6 kmph for reduced...