C-U Smokefree Alliance, A New Cigarette Hazard: 'Third-Hand Smoke': http://www.nytimes.com/2009/01/03/health/research/03smoke.html?ref=health What is third-hand smoke? Is it hazardous? http://www.sciam.com/article.cfm?id=what-is-third-hand-smoke C-U Smokefree! Dan http://www.cu-smokefree.org/