A full range of scientific evidence, extending from the molecular level to whole populations, supports the conclusion that secondhand smoke causes disease. The scope of this evidence is enormous, and encompasses not only the literature on secondhand smoke but also relevant findings on active smoking and on the toxicity of individual tobacco smoke components.
* The Health Consequences of Involuntary Exposure to Tobacco Smoke: A Report of the Surgeon General. https://www.ncbi.nlm.nih.gov/books/NBK44321/356 links to supporting studies and works
