浙江发布霾橙色预警、南京中小学幼儿园全面停课、上海机场能见度过低暂停航班起降……入冬以来,范围最大的一场雾霾逐渐笼罩了中国,从华北到东南沿海、甚至是西南地区,截至12月初,已有25个省(区、市)不同程度地出现雾霾天气。中国气象局的数据显示,2013年我国平均雾霾日数为29.9天,较 Zhejiang issued a haze orange warning, Nanjing primary and secondary kindergarten fully closed, the Shanghai airport visibility is too low to suspend flight ... ... since the beginning of winter, a haze of the largest range of gradually enveloped China, from north China to the southeast coast, and even the southwestern region As of early December, 25 haze (or city) smog weather has occurred in varying degrees. According to the data from China Meteorological Administration, the average number of smog days in China in 2013 was 29.9 days, more than that