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Parentswhosmokeoftenopenawindoworturnonafantocleartheairofsecond-handsmokebutexpertsnowhavefoundanothersmoking-relatedthreattochildren'shearth：third-handsmoke．
That'stheexpressionwhichisusedtodescribetheinvisibleyetpoisonousgasesthatsticktosmokers'hairandclothingandotherthingsintheroom．Thesegasesstaylongaftersmokehasclearedfromtheroom．Youngchildrencangetthemontheirhandsespeciallyiftheyareplayingonthefloor．
“Everyoneknowsthatsecond-handsmokeisbadbuttheydon'tknowaboutthis”saidDr．JonathanP．WinickofftheleadauthorofthestudyatHarvardMedicalSchool．
“Whentheirkidsareoutofthehousetheymightsmoke．Ortheysmokeinthecar．Theythinkit'sokaybecausethesecond-handsmokeisn'tgettingtotheirkids．”DrWinickoffcontinued．
Third-handsmokeiswhatonesmellswhenasmokergetsinanelevator(电梯)aftergoingoutsideforacigaretteorinahotelroomwherepeoplesmoked．“Yournoseisn'tlying．”hesaid．“Thesmellissobadthatyourbrainistellingyou：‘Getaway’”．
Butfarfewerpeoplerealizedtherisksofthird-handsmoke．Sincetheexpressionissonewtheresearchersaskedpeopleiftheyagreedwiththestatementthat“breathingairinaroomtodaywherepeoplesmokedyesterdaycanharmthehealthofchildren．”Only65％ofnonsmokersand43％ofsmokersagreedwiththatstatement．
“Thecentralmessagehereisthatsimplyclosingthekitchendoortotakeasmokeisnotprotectingthekidsfromtheeffectsofthatsmoke”saidanotherdoctor．“Therearesubstances(物质)inthisthird-handsmokeandtheyareacancerriskforanybodyofanyagewhocomesclosetothem．”
Thefactthatthird-handsmokeisharmfulwillmostprobablyleadtoastrictsmokingban(禁止)athome．
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A．
smellsomethingstrangeinahotelr