The city has seen some of the worst air quality on record early this week. (Photo/Xinhua)
The air quality in cities in the eastern Chinese province of Jiangsu has worsened significantly since Monday, with the provincial capital Nanjing immersed in a yellow haze that has prompted experts to say that staying in the city for a day is equivalent to smoking a carton and a half of cigarettes, reports the Hong Kong-based Oriental Daily News.
The deterioration has been attributed to the widespread burning of straw, plus other factors such as a lack of wind, high humidity and low pressure, which have given the air little chance to circulate. Levels of small particulate matter have surged to the level of serious pollution.
Experts said Nanjing registered an air pollution index of 478 on Sunday evening, the worst among the country's major cities.
Many senior residents in Nanjing told the newspaper on Sunday that they have never seen such bad air quality. Visibility in the city was no more than one kilometer, while some areas such as Liuhe district had 500 meters of visibility.