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Long after a cigarette has been extinguished, toxins from tobacco smoke can accumulate in walls, furniture, carpeting, and clothing. A new study, published in Environmental Science & Technology, shows that these harmful particulates can become airborne a second time.

For the study, Yael Dubowski, PhD, lead researcher, and her associates impregnated specific materials, like cotton and paper, with nicotine and exposed them to dry and humid conditions. The results revealed that nicotine remained on the surfaces and could be wiped off on skin or clothing. Furthermore, researchers found that the nicotine could also "desorb" off the material and back into the air, either being inhaled on its own or reacting with other airborne pollutants to form particulates.