雾霾之中的北京西客站（1月29日摄）。北京城区、郊区的空气质量1月28日均达到六级严重污染，空气质量指数AQI均在300以上；1月29日，雾霾更加“深重”，气象部门再次发布霾黄色预警。随着空气中污染物不断累积，北京空气质量实况监测显示，13时城区九成监测站点显示六级污染，AQI指数均在400以上，部分站点有“爆表”趋势。新华社记者 陈树根 摄  Fog haze of Beijing west railway station(January 29 perturbation).The Beijing city/On the outskirts of air quality in January and average daily to six levels of serious pollution,Air quality index AQI are above 300;On January 29,,Fog haze more"deep",Meteorological department issued haze yellow warning again.As the air pollutants to accumulate,Beijing air quality live monitoring display,13 when city ninety percent monitoring site show six levels of pollution,AQI index are above 400,Part of the site has"Detonation table"trend.The xinhua news agency ChenShuGen perturbation 

    雾霾之中的北京西客站（1月29日摄）。新华社记者 陈树根 摄  Fog haze of Beijing west railway station(January 29 perturbation).The xinhua news agency ChenShuGen perturbation 

    这是1月29日傍晚拍摄的雾霾笼罩的北京世纪坛。新华社记者 李欣 摄 This is January 29th evening filming fog haze shrouded Beijing millennium monument.Xinhua news agency reporter li xin perturbation

     这是1月29日傍晚拍摄的雾霾笼罩的北京复兴路。新华社记者 李欣 摄  This is January 29th evening filming fog haze shrouded Beijing road.Xinhua news agency reporter li xin perturbation