1月28日，车辆在雾霾中的北京莲石路行驶。当日9时，北京发布霾黄色预警，预计大部分地区将维持能见度小于3000米的霾。27日以来，北京又遭遇一场雾霾天气，这已经是1月以来雾霾第四次侵扰京城。新华社记者 何俊昌 摄     1 month and day,Vehicles in fog haze of Beijing lotus stone road.When that day and,Beijing release haze yellow warning,Most of the region is expected to maintain visibility of less than 3000 meters of haze.Since the 27,Beijing and was involved in a fog haze weather,This is since January fog haze fourth infestation city.The xinhua news agency HeJunChang perturbation

1月28日，一位骑车人在雾霾中前行。新华社记者 何俊昌 摄 1 month and day,A cyclist in the fog way in the haze.The xinhua news agency HeJunChang perturbation