男女羞羞视频在线观看,国产精品黄色免费,麻豆91在线视频,美女被羞羞免费软件下载,国产的一级片,亚洲熟色妇,天天操夜夜摸,一区二区三区在线电影

Beijing reaches annual 'blue sky days' target

Updated: 2011-12-19 09:29

(China Daily)

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

BEIJING - As of Saturday, Beijing had enjoyed 274 days of "blue sky" in 2011, fulfilling its annual target ahead of schedule, an official at the city's environmental protection bureau said on Saturday.

Beijing experienced an overall decline in the concentration of various pollutants in 2011, said Zhuang Zhidong, deputy director of the bureau.

The concentration of PM10, or particulate matter of less than 10 micrometers, decreased to 114 micrograms a cubic meter this year, the lowest in four years, according to the bureau.

The city's overall air quality was better than last year, with 22 more days of Grade I air quality, Zhuang said.

Beijing uses a five-grade classification of air quality on the basis of pollution indices, with Grade I being the best and Grade V the worst.

Days with Grade I or II air quality are considered "blue sky days."

However, Beijing also experienced several days of poor air quality as a result of adverse weather. Factors such as weaker winds and a rise in humidity are unsuitable for the dispersal of atmospheric pollutants, according to the bureau.

The bureau has been closely monitoring construction sites and coal-fired boilers in order to reduce emissions of pollutants since the city began supplying heat in mid-November.

Air quality monitoring in Beijing made headlines recently due to public debate over different standards of measurement.

China currently uses PM10 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 human health as it can go deeper into the lungs.

The Ministry of Environmental Protection said it has been reviewing the standards.

It said that a new index standard, which would include PM2.5 and ozone density, is scheduled to be fully implemented nationwide in 2016, with pilot projects in certain regions ahead of the national deadline.

Zhuang said the Beijing Environment Monitoring Center is making preparations to monitor PM2.5 levels, including buying equipment, establishing monitoring posts and training staff.

Xinhua

Related Stories

Big challenges for blue-sky days 2007-01-23 07:18
'Blue sky' target fulfiled 2006-12-25 09:47
Nothing but 'blue skies' from now on 2008-08-20 06:57
Beijing warned of 'blue sky' crisis 2006-05-30 15:10
主站蜘蛛池模板: 化州市| 武乡县| 浦城县| 英山县| 曲靖市| 靖宇县| 汝南县| 筠连县| 会泽县| 新巴尔虎右旗| 巫山县| 遂宁市| 廉江市| 民权县| 南汇区| 永川市| 汾西县| 曲沃县| 博罗县| 滕州市| 楚雄市| 武山县| 彭州市| 平武县| 休宁县| 宁乡县| 肇东市| 宁国市| 石嘴山市| 准格尔旗| 伊通| 徐州市| 林甸县| 游戏| 山东省| 始兴县| 同德县| 基隆市| 渝北区| 花莲市| 抚州市| 调兵山市| 雅江县| 二连浩特市| 松原市| 卢龙县| 莆田市| 博罗县| 霍邱县| 新建县| 富裕县| 南通市| 盘山县| 浦北县| 郴州市| 房山区| 湘潭市| 浏阳市| 依安县| 来安县| 大方县| 叶城县| 孟村| 东方市| 北流市| 赤壁市| 新余市| 门头沟区| 溧水县| 汉阴县| 宁津县| 汉中市| 武宣县| 文安县| 米易县| 林州市| 临澧县| 凉城县| 无极县| 巴青县| 赤壁市| 龙江县|