Define thirdhand smoke and summarize its potential health consequences for nonsmokers
Thirdhand smoke is the nicotine residue that is left behind on furniture, walls, and carpet after a cigarette has been smoked in a room. According to scientists, particulates made up of ozone and nicotine can become airborne a second time and, because they are so small, easily penetrate into the deepest parts of the lung. Over time, they could contribute to breathing problems such as asthma or possibly even cancer.
Thirdhand smoke remains in houses, apartments, and hotel rooms even after smokers move out. The toxins it contains can enter the body by breathing, ingestion, or skin absorption. Among their effects on health are an increased risk of breathing problems and cancer in nonsmokers. The danger may be greatest to infants, children, pregnant women, and the elderly.
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