波多野结衣办公室双飞_制服 丝袜 综合 日韩 欧美_网站永久看片免费_欧美一级片在线免费观看_免费视频91蜜桃_精产国品一区二区三区_97超碰免费在线观看_欧美做受喷浆在线观看_国产熟妇搡bbbb搡bbbb_麻豆精品国产传媒

News

Beijing-area air better than before

By Cheng Yingqi (China Daily)
Updated: 2014-03-03 03:54

The pollution that hit Hebei province, Beijing and Tianjin in the past week was less severe than last year's incident, monitoring results revealed.

From Feb 20 to 26, Beijing, Tianjin and Hebei were shrouded in smog.

However, environment-monitoring results of the Chinese Academy of Sciences showed that the average concentration of PM2.5 — fine particulate matter with a diameter less than 2.5 microns that can lodge in the lungs — was 11 percent less than it was when smog hit the region in spring 2013, and the peak concentration decreased by 16.4 percent.

"The concentration of pollutants in the smog decreased by 20 to 30 percent in general over the last year," said Wang Yuesi, a researcher from the Institute of Atmospheric Physics under the Chinese Academy of Sciences.

Wang was speaking on Saturday at a forum in Beijing held by the Chinese Academy of Sciences, which discussed the cause of the smog.

The institute monitored the concentration of PM2.5 and other pollutants across the country, with 23 monitoring stations in North China. The comparison was based on data collected in January and February this year and January 2013, when severe pollution lasted nearly a month in North China.

Both of these smog events had similar climatic conditions, Wang said.

"The monitoring results show that the emergency measures taken to cope with air pollution were effective. But the effect may not be so obvious to the general public because the PM2.5 concentration still caused a deterioration in visibility," he said.

Visibility in the smog was 2 kilometers, while Wang said the visibility will not be improved unless the PM2.5 concentration falls to less than 100 micrograms per cubic meter. In February, it was 230 mg per cubic meter.

Beijing's contingency plan includes forcing nearby plants to cut their production.

However, Wang said that only long-term solutions will end the pollution.

"The major PM2.5 source comes from coal power stations," he said. "The overall area of Beijing, Tianjin and Hebei accounts for some 0.05 percent of the world, while this region consumes 11 percent of its coal, so you don't have to use your imagination to understand why we are suffering from air pollution. We are living inside a huge chimney."

He Hong, a researcher at the Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, said: "Our research shows that 'second particles' contribute around 60 percent to the formation of PM2.5 in Beijing and Tianjin."

Second particles are pollutants generated by chemical reactions between different pollutants released into the atmosphere.

"As a result, reducing the emissions of oxynitride and oxysulfide from coal fuel and vehicles is necessary," He said.

However, due to the complex chemical reactions, scientists are not sure about the exact contributing factors of smog. To understand better, the Chinese Academy of Sciences will apply for construction in 2016 of a "smog chamber" to simulate pollution conditions.

...
波多野结衣办公室双飞_制服 丝袜 综合 日韩 欧美_网站永久看片免费_欧美一级片在线免费观看_免费视频91蜜桃_精产国品一区二区三区_97超碰免费在线观看_欧美做受喷浆在线观看_国产熟妇搡bbbb搡bbbb_麻豆精品国产传媒
亚洲制服欧美中文字幕中文字幕| 狠狠人妻久久久久久综合蜜桃| 在线观看天堂av| 2020国产成人综合网| 蜜桃一区二区三区在线| 天天插天天射天天干| 91精品国产日韩91久久久久久| 亚洲国产综合91精品麻豆| 真实乱偷全部视频| 欧美曰成人黄网| 一区二区欧美精品| 中文字幕视频观看| 欧美一区二区三区不卡| 日本va欧美va精品| 天堂久久精品忘忧草| 精品成人一区二区三区四区| 久久精品国产99国产精品| 人妻一区二区视频| 国产女同互慰高潮91漫画| 国产精品一区二区男女羞羞无遮挡| 四虎成人免费影院| 国产精品天天摸av网| 不卡的av在线播放| 欧美午夜视频网站| 无码av免费一区二区三区试看| 国产一级二级视频| 久久伊99综合婷婷久久伊| 国产一区在线看| 懂色av懂色av粉嫩av| 亚洲女同女同女同女同女同69| 无码国产精品久久一区免费| 欧美日韩国产另类不卡| 日本欧美加勒比视频| 日本黄色小视频在线观看| 中文字幕av在线一区二区三区| 白白色亚洲国产精品| 欧美视频完全免费看| 日本色综合中文字幕| 潮喷失禁大喷水aⅴ无码| 中文字幕一区av| 精品国产免费久久久久久婷婷| 日韩一区二区精品葵司在线 | 少妇高潮惨叫久久久久| 国产精品另类一区| 日本黄色大片在线观看| 精品少妇一区二区三区日产乱码 | 六月丁香婷婷久久| 午夜剧场免费在线观看| 亚洲主播在线播放| 国产人妻大战黑人20p| 中文字幕一区二区三区不卡| 日本五十肥熟交尾| 欧美极品xxx| 2018国产精品| 日本一区二区三区四区| 制服.丝袜.亚洲.中文.综合懂| 欧美大胆人体bbbb| av激情综合网| 精品伦理精品一区| 成人app在线观看| 日韩欧美一级特黄在线播放| 丰满亚洲少妇av| 91精品国产高清一区二区三区蜜臀| 激情小说欧美图片| 欧美色手机在线观看| 国产一区二区免费在线| 精品视频在线免费看| 国产在线精品一区二区不卡了| 欧美自拍丝袜亚洲| 黄色精品一二区| 欧洲色大大久久| 国产一区二区三区日韩| 欧美日韩精品欧美日韩精品一综合| 国产自产视频一区二区三区| 精品夜夜嗨av一区二区三区| 欧美亚洲一区二区在线| 国产一区高清在线| 91精品国产91综合久久蜜臀| av午夜精品一区二区三区| 精品国产区一区| 亚洲最大视频网| 国产精品区一区二区三区| 欧美大片免费播放器| 亚洲欧美日韩久久| 国产福利在线导航| 免费久久99精品国产| 精品视频一区二区不卡| 成人免费高清在线| www精品美女久久久tv| 污污污www精品国产网站| 国产精品精品国产色婷婷| 四虎永久免费在线观看| 五月天婷婷综合| 欧美综合久久久| 成人av网站大全| 国产欧美综合在线| 国产精久久一区二区三区| 亚洲成人av中文| 欧美中文字幕一区二区三区亚洲| 国产高清精品久久久久| 精品久久久三级丝袜| 日本黄色动态图| 亚洲成人免费在线观看| 欧美中文字幕亚洲一区二区va在线| 国产iv一区二区三区| 久久久久久麻豆| 成人性生交大免费看| 日韩在线播放一区二区| 欧美日韩一区二区三区在线 | 亚洲国产精品嫩草影院| 日本丶国产丶欧美色综合| 国产91精品一区二区麻豆网站| 久久久国产一区二区三区四区小说| 狠狠人妻久久久久久综合蜜桃| 午夜视频在线观看一区二区三区| 欧洲生活片亚洲生活在线观看| 97se亚洲国产综合自在线观| 国产精品高潮呻吟| 性色av无码久久一区二区三区| 国产a视频精品免费观看| 中文字幕巨乱亚洲| 国产欧美小视频| 国产伦精品一区二区三区免费迷 | xxxx国产视频| 一区二区三区精品| 欧美亚洲日本一区| 性猛交╳xxx乱大交| 亚洲在线视频一区| 欧美精品日韩综合在线| 一边摸一边做爽的视频17国产 | 自拍视频一区二区| 日韩国产在线一| 日韩免费看的电影| 中字幕一区二区三区乱码| 狠狠狠色丁香婷婷综合激情 | 在线免费播放av| 日本成人中文字幕| 久久亚洲一级片| 貂蝉被到爽流白浆在线观看| 国产东北露脸精品视频| 国产精品二三区| 精品视频免费看| 精品人妻一区二区免费视频| 日本sm残虐另类| 国产调教视频一区| 永久免费看黄网站| 中文字幕第10页| 日韩精品国产欧美| 亚洲精品一区二区三区精华液| 成人免费视频入口| 成人黄色软件下载| 亚洲图片欧美综合| 精品美女在线播放| 国产第一页浮力| 91麻豆蜜桃一区二区三区| 午夜私人影院久久久久| www亚洲一区| 青青青在线免费观看| 天堂va欧美va亚洲va老司机| 日本在线不卡视频| 国产女主播视频一区二区| 在线观看www91| 无码熟妇人妻av| 丰满岳乱妇一区二区三区| 亚洲最快最全在线视频| 日韩片之四级片| 亚洲二区在线播放| 2018国产精品| 国产一区二区精品久久99| 亚洲日穴在线视频| 欧美一个色资源| 男人的午夜天堂| 风韵丰满熟妇啪啪区老熟熟女| 免费在线视频一区| 中文字幕一区二区不卡| 欧美精品v国产精品v日韩精品| 久久久久无码精品国产sm果冻 | 欧美日韩国产成人在线免费| 91成年人网站| 91丝袜呻吟高潮美腿白嫩在线观看| 欧美吻胸吃奶大尺度电影| 欧美 变态 另类 人妖| 成人激情免费视频| 日本视频免费一区| 亚洲人成小说网站色在线| 日韩欧美亚洲国产精品字幕久久久 | 岛国精品一区二区| 午夜视频一区二区| 国产精品国产三级国产普通话三级| 7777精品伊人久久久大香线蕉的| 日本成人精品视频| 特级西西人体4444xxxx| 成人av电影观看| 激情成人综合网| 午夜精品久久久| ...av二区三区久久精品| 欧美成人精品二区三区99精品| 一道本成人在线| 欧美激情 一区| 视频免费在线观看|