一项由烟草商进行的未公开发表的研究显示,香烟侧流烟(抽吸间隙烟头燃烧产生的烟)的毒性强于吸入的主流烟,二手烟中85％为侧流烟,其中每克总颗粒物的毒性比主流烟高4倍。发表于Tobacco Control(2005; 14:394-404)上由Philip Morris烟草公司于20世纪80年代进行的一项研究显示,“烟草商一直努力想推翻二手烟可导致肺癌这种观点,包括资助了一 An unpublished study by tobacco companies showed that cigarettes were more toxic than cigarettes when they were smoldered (smoking cigarettes), with 85% of secondhand smoke as sidestream smoke, with each gram The total particulate matter is 4 times more toxic than mainstream smoke. A study by Tobacco Control (2005; 14: 394-404) conducted by the Philip Morris Tobacco Company in the 1980s shows that "tobacco companies have been trying hard to overturn secondhand smoke for lung cancer, including funding one