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Secretary Luo Yi said that in November, 74 cities in the ratio of the number of days between the standard 16.7% to 100%. Among them, the standard number of days the proportion of Guiyang, Xiamen, Fuzhou, Lhasa, Kunming, Huizhou, Jiangmen, Haikou, Guangzhou, Taizhou, Shenzhen, Zhoushan, Quzhou and Nanning 14 cities to 100%, Chongqing, Wenzhou and Dongguan and other 22 cities standard number of days the ratio is between 80% to 100%, Taizhou, Changzhou and Suzhou and other 24 cities the number of standard days ratio between 50% to 80%, Shenyang, Harbin, Jinan, Hengshui, Xingtai, Cangzhou, Changchun, Tangshan, Langfang , Zhengzhou, Dalian, Baoding, Beijing and Tianjin cities 14 standard number of days for less than 50%. Exceeded the maximum number of days in the primary PM2.5 pollutants for several days, followed by PM10. In November, with the northern region have moved into the heating season, by the impact of pollution and adverse weather conditions, Northeast China, North China, a wide range of impact occurs pollution was severe, long duration of heavy air pollution in the process. November 1 to 14, the Northeast region sustained heavy pollution process, the three northeastern provinces a total of 36 prefecture-level and above cities, 34 cities have both been severe and more pollution process, Shenyang consecutive 5 days of severe and more pollution Harbin, Changchun and Anshan and other 12 cities are in a row and more than four days of severe pollution. Among them, Harbin PM2.5 concentrations peak hours close to 1,000 micrograms / cubic meter, Changchun, Shenyang and other cities PM2.5 concentrations peak hours or even extreme peaks in excess of 1000 micrograms / cubic meter. November 27 - December 1, Beijing, Tianjin region sustained heavy air pollution process, the region 13 cities, 10 cities and more than a severe pollution, which Shijiazhuang City air quality for 5 consecutive days for serious pollution ; serious pollution in Beijing four days, one day of severe pollution; Baoding, Langfang and Xingtai and other three cities each appear three days of serious pollution, the two days of severe pollution. Heavy air pollution during the city's largest daily PM2.5 concentration and maximum hourly average concentrations appear in Baoding, respectively, 513 micrograms / cubic meter and 740 micrograms / cubic meter, the maximum point PM2.5 hour concentration of 900 micrograms / cubic meters; maximum Beijing PM2.5 daily average concentration of 464 micrograms / cubic meter, the maximum hourly average concentration of 605 micrograms / cubic meter. Heavy air pollution by the process, part of the city's main pollution

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