我的英作文WhatcausesLungCancerThereareseveralwaystocauseslungcance这是第一段我忘了打烦请您再过目Thereareseveralwaystocauseslungcancer.First,onemajorreasonisairpollutionleadtolungcancersuchassmoking

　　我的英作文WhatcausesLungCancerThereareseveralwaystocauseslungcance

　　这是第一段我忘了打烦请您再过目Thereareseveralwaystocauseslungcancer.First,onemajorreasonisairpollutionleadtolungcancersuchassmoking.Thematerialsofcigarettearerelatedtotobaccoleaveswithtoxicsubstancesandchemicalcarcinogen;thereforeitcancauseheavysmokergethigherprobabilityofthelungcancer.Especially,althoughyouareanon-smoker,youmighthavechancetogetlungcancerbypassivessmoking.