Sorry, that link was second hand smoke, here is a reference to the study about
third hand smoke.
These studies are generally sponsered by anti-smoking groups, but they are done by impartial scientists with impartial science, so I wouldn't question the results just because the funding came from some a-holes that want to ban tobacco. It's not a question of whether or not smoking is a filthy habit, it's a question of whether or not we want the governent regulating our filthy habits
