Recently, the Chinese Academy of Sciences (CAS) released research indicating that thirdhand smoke poses more persistent and severe health risks than firsthand or secondhand smoke. Thirdhand smoke refers to the residual tobacco particles left behind on clothing, furniture, carpets, walls, hair, and skin after smoking has occurred. These residues can react chemically with common indoor pollutants—such as nitrous acid—to form potent carcinogens like tobacco-specific nitrosamines (TSNAs). Studies show that these harmful substances can linger for weeks or even months after smoking stops, continuing to release toxins that enter the human body through inhalation, skin contact, or accidental ingestion—especially by infants and young children.CAS researchers emphasize that children and pregnant women are particularly vulnerable. Young children, who often crawl on floors, touch surfaces, and put their hands in their mouths, are at higher risk of ingesting toxic thirdhand smoke compounds. Prolonged exposure may impair neurological development, increase asthma risk, and elevate cancer probability. Moreover, standard cleaning methods cannot fully eliminate thirdhand smoke residues, and airing out rooms or using air fresheners offers little protection.Experts recommend that smokers avoid smoking indoors and change clothes, wash hands, and cleanse their faces before interacting with children. The most effective solution, however, remains complete smoking cessation. This research serves as a crucial reminder that tobacco control is not just about personal health—it also safeguards the long-term well-being of family members, especially vulnerable populations.
近日，中国科学院发布研究指出，三手烟的危害比一手烟和二手烟更为持久且严重。所谓‘三手烟’，是指吸烟后残留在衣物、家具、地毯、墙壁甚至头发和皮肤上的烟草残留物。这些残留物会与环境中常见的污染物（如亚硝酸）发生化学反应，生成强致癌物，例如烟草特有亚硝胺（TSNAs）。研究表明，即使在吸烟行为结束后数周甚至数月，这些有害物质仍可能持续释放，并通过呼吸、皮肤接触或误食（尤其是婴幼儿）进入人体。中科院专家强调，三手烟对儿童和孕妇的危害尤为突出。由于儿童常在地上爬行、触摸物品并把手放入口中，更容易摄入三手烟中的有毒成分。长期暴露可能影响神经系统发育、增加哮喘风险，甚至提升患癌概率。此外，常规清洁手段难以彻底清除三手烟残留，通风或使用空气清新剂也无法有效消除其危害。专家建议，为减少三手烟风险，吸烟者应在室外远离家人处吸烟，并在接触孩子前更换衣物、洗手洗脸。最根本的解决方式仍是彻底戒烟。该研究提醒公众，控烟不仅关乎个人健康，也关系到家庭成员特别是弱势群体的长期安全。
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