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【《科学新闻》1986年9月】报道根据环境保护处认为,在屋内与放射性的氡及其衰变产物接触,引起美国每年5,000一20,000例肺癌。因此除吸烟后,氛是美国因肺癌死亡的第二主要原因。
ScienceNews, September 1986 It is reported by the Environmental Protection Department that exposure to radioactive radon and its decay products in the home caused 5,000 to 20,000 lung cancers in the United States each year. So after smoking, the atmosphere is the second leading cause of death from lung cancer in the United States.