Beijing sees decline in PM2.5 density

    Updated: 2012-01-07 22:51

    (Xinhua)

      Comments() Print Mail Large Medium  Small 分享按鈕 0

    BEIJING - Beijing has seen a decline in PM2.5 density besides the decrease of the PM10 density during the past decade according to some relevant research data, Beijing's Municipal Environmental Protection Bureau said Friday.

    The average annual PM2.5 density in Beijing has reduced from 100-110 micrograms per cubic meter of air in the year of 2000 to 70-80 micrograms per cubic meter in 2010, said Yu Jianhua, an official with the bureau.

    The downtrend still continues at present, Yu said.

    Although Beijing did not monitor air-quality using the PM2.5 gauge ten years ago, the undisclosed PM2.5 data is available for laboratory use, according to Yu.

    China currently uses PM10, or particular matter under 10 micrometers, to measure air quality, but the public has urged government authorities to apply the tighter PM2.5 standard, which measures finer matter that is considered more hazardous to people's health as it can go deeper into the lungs.

    The Ministry of Environmental Protection said it has been considering revising present standards and a new index standard which includes the measuring of PM2.5 and ozone density is scheduled to be fully implemented nationwide in 2016 with pilot projects conducted in certain regions ahead of the national deadline.

    中文字幕无码不卡免费视频| 无码国产精品一区二区免费模式| 久久久久久精品无码人妻| 最近最新高清免费中文字幕| 99久久中文字幕| 无码137片内射在线影院| 亚洲中文字幕AV在天堂| 天堂新版8中文在线8| 国产50部艳色禁片无码| 亚洲美日韩Av中文字幕无码久久久妻妇 | 人妻无码久久精品| 91中文在线观看| 永久免费无码网站在线观看个| 中文字幕在线观看有码| 亚洲午夜国产精品无码 | 男人的天堂无码动漫AV| 暖暖日本中文视频| 内射无码专区久久亚洲| 中文无码字慕在线观看| 亚洲日本va中文字幕久久| 人妻aⅴ无码一区二区三区| 国产精品无码AV一区二区三区 | 无码国产亚洲日韩国精品视频一区二区三区 | 亚洲精品一级无码鲁丝片| 亚洲国产综合精品中文第一区| 色视频综合无码一区二区三区| 日韩人妻无码一区二区三区99 | 波多野结衣在线aⅴ中文字幕不卡| 日本中文字幕一区二区有码在线| 亚洲av福利无码无一区二区| 无码国产伦一区二区三区视频| 狠狠精品久久久无码中文字幕| 丰满少妇人妻无码| 丰满少妇人妻无码| 亚洲一区爱区精品无码| 日韩乱码人妻无码中文字幕视频 | 中文字幕在线免费观看| 99久久无色码中文字幕人妻| 无码精品尤物一区二区三区| 天堂а√在线中文在线最新版| 久久无码人妻一区二区三区|