Third-hand smoke contains carcinogens too, study says

February 8, 2010, 3:01 am by Scientific American: Mind and Brain

Anyone walking into a smoker's abode can tell you that the traces of tobacco use don't vanish when a cigarette or cigar is extinguished. But just what happens to this "third-hand" smoke once the air has cleared--and can it still be harmful? [More]

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