免费日韩片_欧美成人精品一区二区男人小说_国产乱码一区二区三区四区_国产精品国产三级国产aⅴ入口_成人看的污污超级黄网站免费_欧美一级在线免费观看_成人午夜免费无码福利片_国产乱人伦偷精品视频色欲_aaa少妇高潮大片免费看_国产精品1234_亚洲精品国产suv一区88_中文字字幕在线中文无码_精品亚洲区_午夜九九九_国产av国片精品jk制服丝袜_色综合亚洲_亚洲成av人片无码bt种子下载_欧美色就色_精品少妇的一区二区三区四区_男人用嘴添女人下身免费视频

Beijingers are to be warned of "haze" in daily weather forecasts so they can take measures to avoid air pollution.

The municipal meteorological authorities are to include haze levels on hazy days when the humidity is under or at 80 percent from February 1.

Haze would be divided into three grades -- light, moderate and heavy, said Guo Hu, head of the Beijing Municipal Meteorological Station.

Light would be defined as visibility between five and 10 kilometers; moderate with visibility between two and five kilometers; and heavy haze means visibility under two kilometers.

Guo said haze formed when the concentration of dust, smog and other harmful matter was high in the air during days without wind.

Experts warn that haze contains substances harmful to the respiratory tract and lungs. The public is recommended to stay indoors during moderate and heavy haze days.

Beijing reported 10 haze days in December, or one-third of the total recorded in the capital last year.

Shi Hanmin, head of Beijing Municipal Environmental Protection Bureau, said last week that local environmental authorities would take further steps to control air pollution and had set an ambitious target of 245 "blue sky" days this year after beating the 2006 goal.

The authorities reported the annual target of 238 days with fairly good air quality had been reached on December 24, and recorded three more such days before the New Year.

Experts said rain in July and August led to the record number of good air quality days.

Du Shaozhong, deputy director of the bureau, attributed the achievement partly to intensified efforts made by environmental protection agencies in reducing pollution from coal burning.

According to the bureau's website, the municipal government will put air quality improvement, the public's biggest concern, on top of its agenda this year.

Beijing launched the "Defending the Blue Sky" program in 1998, when the city had only about 100 days of "blue sky" a year.