久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

US EUROPE AFRICA ASIA 中文
Business / News

China uses PM 2.5 in weather alert system

(Xinhua) Updated: 2013-01-30 06:49

BEIJING - China's meteorological authority has introduced a new weather warning system for smog which will use readings of PM 2.5, a particle pollutant.

The announcement comes as thick haze chokes many cities.

The National Meteorological Center (NMC) has introduced a three-tier color-coded weather warning system to alert the public to the severity of smog. The system uses yellow to imply moderately smoggy weather, orange for severe conditions and red for extremely severe levels of smog.

The system not only measures the density of PM 2.5, a major pollutant that triggers smog, but also takes into account visibility and relative humidity to better reflect air quality conditions, according to the center.

The smog that has blanketed many Chinese cities in recent days has affected a total area of 1.3 million square kilometers, according to the Ministry of Environmental Protection.

The municipalities of Beijing and Tianjin, together with the provinces of Hebei, Shandong and Henan, will remain the hardest-hit regions on Tuesday evening through Wednesday daytime.

However, rain and snow that is expected to fall on Wednesday night will help disperse the smog in central and eastern regions, the NMC said.

Earlier this month, several consecutive days of smoggy weather choked Beijing and other cities in north and east China, as readings for PM 2.5 far exceeded safe levels.

Hot Topics

Editor's Picks
...
主站蜘蛛池模板: 洋老外米糕国产一区二区 | 多人伦精品一区二区三区视频 | 日本高清无吗免费播放 | a一级特黄日本大片 s色 | 精品国产91在线网 | 深夜福利视频在线观看免费播放 | 日韩精品一区在线观看 | 久久99爰这里有精品国产 | 日韩欧美一区二区三区免费观看 | 国产亚洲自在精品久久 | 欧美日本一道高清二区三区 | 一级毛片免费视频观看 | 91热视频在线观看 | 欧美亚洲日本一区二区三区浪人 | 窝窝人体色 | 亚洲男人的天堂网 | 日韩美女免费视频 | 国产aaa毛片 | 亚洲免费不卡 | 日本在线毛片视频免费看 | 一级不卡毛片免费 | 国产在线精品二区韩国演艺界 | 久久久久久久久久久久久久久久久久 | 看片亚洲 | 精品欧美成人bd高清在线观看 | 精品久久久久久亚洲 | 九热视频在线观看 | 亚洲欧美偷拍自拍 | 欧美日中文字幕 | 日韩一级大片 | 日本一级特黄啪啪片 | 欧美视频在线观看一区二区 | 九九成人免费视频 | 在线免费亚洲 | 欧美同性videos在线可播放 | 91欧美激情一区二区三区成人 | 在线国产二区 | 一级成人毛片 | 美女张开腿让男人桶下面 | 一级成人| 欧美一区综合 |