PNAS: Exposure to smokers 'rooms or objects in cars is likely to cause cancer. Researchers have found that even if you do not smoke, staying in smokers' rooms or cars may increase the risk of cancer. Cigarette smoke residues "lurk" on the surface of carpets, sofas, and other everyday objects. These residues can react with common chemicals in the room to generate carcinogens. The study was published in the Proceedings of the National Academy of Sciences (PNAS) in the United States. The residue of cigarette smoke attached to the surface of everyday objects is now called "third-hand smoke". The researchers said that their findings further confirmed the potential long-term health risks of exposure to third-hand smoke. In particular, it will cause greater harm to infants and young children. They crawl around, play and often touch the contaminated surface more frequently. Researcher Hugo De Stellaz and colleagues studied the results of nicotine exposure to nitrous acid, a common indoor pollutant found in smokers' cars. After a cigarette is lit, nicotine will be released into the air, leaving it on the surface of indoor objects for weeks or even months. The researchers also found that indoor nitrite content is higher than outdoor. Nicotine reacts with nitrous acid to form carcinogen nitrosamines. The researchers found that the surface of objects in the smoker's car had a high nitrosamine content. After the cigarette smoke has dissipated, more than half of this carcinogen remains for at least 2 hours. Researchers point out that people are most likely to be exposed to nitrosamines by contacting cigarette smoke contaminating surfaces such as clothing, furniture and even skin or hair. Researchers warn that infants and children are at a much higher risk of exposure to these carcinogens than adults.
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