North India Chokes For Breath, Farm Fires Highest In Last 3 Years
As winter sets in, the air hanging over north India has thickened with smoke from burning fields, making it hard to breathe. Farm fires highest in the last 3 years. Uttar Pradesh has the highest number of top polluted cities. Delhi, meanwhile, is back in 'severe' air quality zone with the pollution levels in the national capital rising sharply on Thursday as winds died down.
