翻譯資格高級口譯材料：PM2.5首次成為霾預警指標
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1月29日，中國的灰霾面積達130萬平方公里。環保部有關負責人昨日表示，截至當日上午10時，北京、天津、石家莊、濟南等城市空氣質量為六級，屬嚴重污染;鄭州、武漢、西安、合肥、南京、沈陽、長春等城市空氣質量為五級，屬重度污染。
記者昨日還獲悉，氣象部門針對霾預警信號標準進行了修訂，首次將PM2.5作為發布預警的重要指標之一。這意味著PM2.5首次成為氣象部門霾預警指標。
記者從北京兩會上獲悉，北京計劃于今年年底前出臺《大氣污染治理條例》，切實改善城市空氣質量水平。
China's meteorological authority has introduced a new weather warning system for smog which will use readings of PM2.5, 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.
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