随着空气质量的恶化,阴霾天气现象出现增多,危害加重.中国不少地区把阴霾天气现象并入雾一起作为灾害性天气预警预报.统称为“雾霾天气”.其实雾与霾从某种角度来说是有很大差别的.譬如：出现雾时空气潮湿；出现霾时空气则相对干燥,空气相对湿度通常在60%以下.其形成原因是由于大量极细微的尘粒、烟粒、盐粒等均匀地浮游在空中,使有效水平能见度小于10KM的空气混蚀的现象 　　Withthedeteriorationoftheairquality,hazeweatherphenomenontoappearincreasing,harmaggravated.InsomeareasofChinathehazeweatherphenomenonincorporatedintofogtogetherasasevereweatherwarningforecast.Collectivelyreferredtoas"foghazeweather".Infactthefogandhazeinsomepointofviewthere'sabigdifference.Suchas:appearfogairmoisture;Appearwhenairisrelativelydryhaze,airrelativehumidityusuallyunder60%.Theformingreasonisduetoalargenumberofverysmalldustparticles,smokeparticle,suchasYanLievenlysuspendedintheair,makeeffectivehorizontalvisibilitylessthan10kmairmixedcorrosionphenomenon 　　吸入过多可致死亡 　　Hazeinthesuctionofrespiratorytractafterharmfultohumanbody,long-termintakemaycanleadtodeath.