12月24日，兰州市环境监测站铁路设计院监测点技术人员查看监测数据。12月上旬以来，冬季污染严重的城市兰州市开始通过互联网公布城区“污染物小时浓度”，其中包括细颗粒物(PM2.5)等6项监测指标。新华社记者 聂建江 摄     On December 24,Lanzhou railway institute of environmental monitoring station monitoring point technical personnel check monitoring data.Since early December,Winter seriously polluted city of lanzhou city through the Internet started released"Pollutant concentration of hours",Including fine particles(PM2.5)6 and monitoring indicators.The xinhua news agency NieJianJiang perturbation

    12月24日，兰州市环境监测站铁路设计院监测点技术人员在检查检测设备。12月上旬以来，冬季污染严重的城市兰州市开始通过互联网公布城区“污染物小时浓度”，其中包括细颗粒物(PM2.5)等6项监测指标。新华社记者 聂建江 摄     On December 24,Lanzhou railway institute of environmental monitoring station monitoring point technical personnel in the inspection testing equipment.Since early December,Winter seriously polluted city of lanzhou city through the Internet started released"Pollutant concentration of hours",Including fine particles(PM2.5)6 and monitoring indicators.The xinhua news agency NieJianJiang perturbation

    12月24日，兰州市环境监测站铁路设计院监测点技术人员在监测室内工作。12月上旬以来，冬季污染严重的城市兰州市开始通过互联网公布城区“污染物小时浓度”，其中包括细颗粒物(PM2.5)等6项监测指标。新华社记者 聂建江 摄     On December 24,Lanzhou railway institute of environmental monitoring station monitoring point technical personnel in the monitoring indoor job.Since early December,Winter seriously polluted city of lanzhou city through the Internet started released"Pollutant concentration of hours",Including fine particles(PM2.5)6 and monitoring indicators.The xinhua news agency NieJianJiang perturbation