Third-handsmokereferstothetobaccosmokecontaminationthatlingersoncarpets,clothesandothermaterialshoursordaysaftersmoking.Accordingtoastudy,alargenumberofpeople,particularlysmokers,havenoideathatthethird-handsmokeisahealthhazardforpeople.Ofthe1,500smokersandnonsmokerssurveyed,thevastmajorityagreethatsecond-handsmokeisharmful.Butwhenaskedwhethertheyagreedwiththestatement,“Breathingairinaroomwherepeoplesmokedyesterdaycanharmyourhealth,”only65%ofnonsmokersand43%ofsmokersgavetheaffirmativeanswer.