It’s no secret that smoking is really bad for your health, and that secondhand smoke can be just as dangerous. Now researchers have found that exposure to “thirdhand” smoke—the residue and smell left behind in an area that someone has been smoking in—can cause genetic damage to cells in humans. This “genotoxicity” has been linked to diseases, including cancer. To summarize: Simply being in close proximity to a place where cigarettes may have once been, or just watching an episode of Mad Men, is a significant health risk …
