A further study focuses on so-called “third-hand smoke”, i.e. that type of second-hand smoke in which the injured party is in an environment, usually closed, where someone has smoked. The most striking example may be the interior of a car in which someone has smoked and there are still cigarette butts and ashes in the ashtrays.
This new study confirms that the remains of smoked cigarettes can cling to the bodies or clothes of smokers and then be released into non-smoking environments.
The team of researchers, led by Drew Gentner of Yale, shows in this study that these cigarette compounds can literally travel, and even in abundant quantities, in indoor environments frequented by non-smokers transported by smokers themselves.
According to the researchers, a person, even if he or she is in a room where no one has smoked, can still be exposed to many of the chemical compounds found in a cigarette if a person who had previously smoked has entered that room.
As Gentner explains, “People are substantial carriers of third-hand smoke contaminants in other rooms. Therefore, the idea that someone is protected from the potential health effects of cigarette smoke because they are not directly exposed to second-hand smoke is not right”.
To reach these conclusions, the researchers analysed the traces of cigarette compounds in a movie theatre. The researchers found that the amounts of these substances left by smokers, for example through their clothes on armchairs or in the air, increased dramatically after the screening of R-rated films, i.e. films for adults who naturally saw more smokers in the cinema.
The quantities of these dangerous substances, of which nicotine was the largest representative, were not even to be overlooked, according to the researchers: they were comparable to those of exposure to second-hand smoke.
These compounds continue to make their way into enclosed spaces despite strong bans and numerous regulations in many states around the world prohibiting people from smoking not only inside public places but also near entrances or near air vents.