资源描述：
《雾霾天气英语介绍》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、雾霾天气-英语介绍背景知识：ThemarketfordustmasksandairpurifiersisboominginBeijingbecausethecapitalhasbeenshroudedforseveraldaysinthickfogandhaze.近几日北京持续被浓重雾霾笼罩，市场上防尘口罩和空气净化器的销量剧增。雾（fog）和霾（haze）是这两天我们经常听到的两个词，二者的区别为：雾的相对湿度（therelativehumidity）一般在90%以上，而霾在80%以下，但通常两者并
2、存。能见度（visibility）在1公里以下的称为雾，1公里以上但小于10公里的属于灰霾（dusthaze）现象。近两日，部分地区的空气质量指数（airqualityindex,AQI）可能达到极重污染，北京多地PM2.5浓度“爆表”。PM2.5就是指“可入肺颗粒物”，PM的英文全称为particulatematter（微粒物、悬浮微粒），PM2.5就是指大气中直径小于或等于2.5微米的颗粒物，可直接进入人体的alveoliofthelungs（肺泡），它的直径还不到人头发丝粗细的1/20。PM2.
3、5主要来自burningoffossilfuelsinvehicles（机动车燃油）,powerplants（发电厂）以及variousindustrialprocesses（各类工业生产）。相关报道：1、Pollutionmaymakeeconomystumble污染可能绊住经济发展的步伐Construction,tourism'willbehitbyhazeandmeasurestotackleit'Asanumberofcitiestrytocleartheair,specialistsinBe
4、ijingwarnthatthepollutionandemergencyresponsestoreduceitcoulddamagetheeconomyandtourism.AuthoritiesinthecapitalsaidonMondaytheyhadordered58factorieswithhighemissionstosuspendoperations.Workatconstructionsitesthatcouldcausedust,suchaslevelingland,wereals
5、ohalted.ThemovefollowedsimilaractioninShijiazhuang,inneighboringHebeiprovince,whereauthoritiesstoppedworkatmorethan700constructionsites.HeavyfogenvelopsNanchangcityinJiangxiprovinceonJan14,2013.[Photo/Xinhua]Bothcitieshaveadvisedyoungchildrenandtheelder
6、lytostayindoors.Thecapitalhasorderedkindergartens,primaryandmiddleschoolstoscrapphysicaleducationclassesuntilairqualityimproves."Pollutionfromthe58factorieshasbeencut,andwebelievewecanreducetheiremissionsby30percent,"LiHong,deputydirectorofBeijing'sEcon
7、omyandInformationTechnologyCommission,saidatanewsconferenceheldjointlybyseveraldepartmentsonMonday.Thefactoriesorderedtohaltoperationsincludetwocementplants,andothersinvolvedinchemicals,metallurgyandbuildingmaterials,hesaid.Upto30percentofgovernmentvehi
8、cleshavealsobeenbannedfromthecapital'sroadsonheavilypolluteddays,accordingtoaspokesmanfortheBeijingTrafficManagementBureau.Driversfoundguiltyofbreakingtherulesfacepenalties,butthespokesmandidnotelaborate.Airqualitydroppeddramatic
