<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区

          Thick smog grounds flights and fouls air

          Updated: 2012-01-11 08:20

          By Zheng Xin (China Daily)

            Comments() Print Mail Large Medium  Small

          BEIJING - More than 100 flights in Beijing were grounded because of smog at dawn on Tuesday, according to Capital International Airport.

          Thick smog grounds flights and fouls air

          A resident wearing a mask and sunglasses walks in Beijing, as heavy smog hit the city on Tuesday. Wamg Jing / China Daily

          The smog, which delayed 80 flights and canceled 43 by 12 pm, caused a surge of airborne particulate matter in most parts of the city, the Beijing Municipal Environmental Protection Bureau said on its micro blog.

          Visibility was reduced to less than 200 meters during rush hours, according to the city's meteorological bureau.

          Air quality worsened with the smog, with the US embassy's air pollution index reading 500 at 7 am on Tuesday and its PM2.5 measurement (particulate matter smaller than 2.5 micrometers) reading 513 micrograms a cubic meter.

          The embassy issued a health warning of emergency conditions in the morning, saying "all people are more likely to be affected".

          According to the Beijing municipal environmental monitoring center, the capital witnessed a rapid increase of inhalable particle density since dawn because of the fog, especially in southeastern and southwestern parts of the city.

          The data showed the average Air Pollution Index, based on PM10 data collection, around the US embassy was 212 micrograms a cubic meter, with sulfur dioxide readings reaching 70 and nitrogen dioxide reaching 102. The smog began to disperse as the wind picked up at midday, allowing planes to take off and land, with visibility improving to 2,000 meters around 1 pm, according to airport.

          The city's monitoring station started releasing the pollutant density data collected at the 27 stations around the city, including the sulfur dioxide, nitrogen dioxide and PM10 levels.

          Since Monday, the station has provided detailed data by area instead of a general figure for the whole city.

          In addition, hourly readings of pollutants will soon be issued instead of the daily figure, and data on PM2.5 will be announced before the start of Spring Festival, which falls on Jan 23, the bureau said.

          The bureau has also promised to take measures to reduce air pollutants.

          "Although the foggy weather keeps the pollutants from dispersing, the PM2.5 readings wouldn't be this high if the city's air were clean enough, however heavy the fog is," said Wang Qiuxia, a researcher at Green Beagle, an environmental protection non-governmental organization based in Beijing.

          "The fog is not an excuse."

           

          主站蜘蛛池模板: 人妻少妇偷人一区二区| 欧美极品色午夜在线视频| 韩国18禁啪啪无遮挡免费| 色吊丝av中文字幕| 日本国产精品第一页久久| 欧美日韩精品一区二区三区高清视频| 少妇久久久被弄到高潮| 亚洲熟女精品中文字幕| 91久久国产热精品免费| 欧美大胆老熟妇乱子伦视频| 美女爽到高潮嗷嗷嗷叫免费网站| 理论片午午伦夜理片久久| 97亚洲熟妇自偷自拍另类图片 | 大香伊蕉在人线国产免费| 久久精品色一情一乱一伦| 久爱www人成免费网站| 亚洲国产成人一区二区在线| 成人永久免费A∨一级在线播放 | 国产乱女乱子视频在线播放| 又大又硬又爽免费视频| 天堂av色综合久久天堂| 亚洲自在精品网久久一区| 国产精品多p对白交换绿帽| 亚洲欧洲自拍拍偷午夜色| 人人模人人爽人人喊久久| 成人片99久久精品国产桃花岛| 黑人巨大亚洲一区二区久| 亚洲色一色噜一噜噜噜| 2020国产欧洲精品网站| 91久久青草精品38国产| 久久精品国产亚洲av品| 日韩幕无线码一区中文| 乱码中文字幕| 久久亚洲精品成人综合网 | 四虎国产精品永久在线下载| 97精品尹人久久大香线蕉| 成人精品色一区二区三区| 亚洲 制服 丝袜 无码| 又大又硬又爽免费视频| 亚洲伦理一区二区| 亚洲综合天堂一区二区三区|