1月23日，车辆缓慢行驶在大雾弥漫的北京东三环国贸桥上。当日，北京大雾弥漫。北京市气象局在早晨6时15分发布霾黄色预警，预计当天白天全市大部分地区将出现能见度小于3000米的霾，空气污浊，请市民注意防范。新华社记者 罗晓光 摄 On January 23,,Vehicle driving slowly in the fog diffuse Beijing guomao section of the bridge.the,Beijing fog diffuse.The Beijing meteorological bureau 6 in the morning 15 points issued haze yellow warning,On the day the day is expected to most areas will appear visibility of less than 3000 meters of haze,Air dirty,Please pay attention to the prevention citizens.The xinhua news agency LuoXiaoGuang perturbation

   1月23日，戴着口罩的市民行走在大雾弥漫的北京东三环街道上。新华社记者 罗晓光 摄    On January 23,,Wearing a mask of citizens to walk in the heavy fog diffuse Beijing section of the street.The xinhua news agency LuoXiaoGuang perturbation

    1月23日，几名戴口罩的市民行走在大雾弥漫的北京东三环街道上。新华社记者 罗晓光 摄     On January 23,,Several wear a face mask to walk in the heavy fog diffuse the citizens of Beijing section of the street.The xinhua news agency LuoXiaoGuang perturbation

这是1月23日拍摄的北京天坛公园内的游客。新华社记者 李文 摄 This is taken on January 23, the temple of heaven in Beijing park visitors.Xinhua news agency reporter when levin perturbation

1月23日，几名市民戴着口罩在北京石景山半月园锻炼。新华社记者 何俊昌 摄 On January 23,,Several people wore masks in Beijing shijingshan half moon garden exercise.The xinhua news agency HeJunChang perturbation

这是1月23日上午拍摄的北京南二环附近某小区楼房。新华社发（万象 摄） This is January 23 morning shooting Beijing for ring near a residential area of the building.The xinhua news agency hair(Images of perturbation)

这是1月23日拍摄的北京石景山区银河大街。新华社记者 何俊昌 摄 This is January 23, shooting of the Beijing city galaxy street.The xinhua news agency HeJunChang perturbation