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11月20日，北京遭遇今冬以来最大范围的大雾天气。北京市环保监测中心发布的空气质量日报显示，这场大雾使北京市20日的空气质量降至四级(1)中度污染，这是半年多来空气质量最糟糕的一天。部分地区的能见度仅为100米，整个京城灰蒙蒙一片，高层建筑物也完全被大雾笼罩。气象部门一天两次发布大雾黄色预警，5条高速公路被迫暂时封闭。专家提醒市民减少户外活动。 People visit the Tiananmen Square as thick fog smothersBeijingNovr 20, 2006. Heavy fog enveloped the capital and much ofnorthand east China beginning Sunday night, forcing the closureofhighways around the Beijing and Tianjin area, and delay ofseveralflights at the Capital International Airport.[Xinhua]
Beijing residents have warned to stay indoors due tohighpollution levels, as a blanket of heavy smog across northernChinacaused traffic chaos and delayed flights throughouttheregion.Under these weather conditions it is better toreduceoutdoor activities especially in areas where pollutantsareconcentrated such as where traffic is heavy, theBeijingenvironmental protection bureau said on its websiteMonday.
Residents should take measures to protect themselves in ordernotto breathe heavily polluted air.
During the 24-hour period from Sunday noon, Beijings airqualitywas rated a hazardous four on a scale of five, the bureausaid,with five representing the worst level of pollution.
Besides the regular car pollution, the bad air quality wasalsodue to the citys 6,000 coal-fire heating furnaces and up totwomillion home coal burners that went into operation this monthtoprovide the capital with heat, it said.
Meanwhile the blanket of smog caused traffic chaos as driverswerecenter lined up at numerous highways that were shut down due totheatmospheric conditions.
Five highways in the capital and eight in neighboring Tianjinwereshut down beginning late Sunday due to the fog, whichreducedvisibility in some places to as low as 100 meters, Xinhuanewsagency reported.
During Beijings early morning rush hour Monday, 154accidentswere reported, with some of the incidents due to heavysmog, thereport said.
Fog was worse in northeastern Liaoning province andeasternShandong province where air flights in and out of theregions weredelayed since Sunday, sete reports said.
Beijing has set an ambitious annual target of realizing blueskydays of level two air quality or better 65 percent ofthetime.
As of Novr 14, the city had registered 213 blue sky daysandneeded an additional 25 more clean air days by the end of theyearto reach the target, the environmental bureau said.
We still have hopes to fulfill this years task, it can bedonebut it will be a serious challenge and we must not takethislightly, it said in a report.
Beijing, a city of 15 million people, is regarded as one ofthemost heavily polluted in China, although authorities aretryingdesperately to improve the situation ahead of the 2008OlympicGames.
Vocabulary:
smog
：被烟尘污染的雾
up to
: 达到（数字）
coal-fire heating furnaces
: 煤火炉
shut down
: 封（路）
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