[troutman]

http://skeptics.stackexchange.com/qu...e-cause-cancer

http://www.ncbi.nlm.nih.gov/pubmed/17690135

From a total of 101 primary studies, 55 studies are included in this meta-analysis

The abundance of evidence, consistency of finding across continent and study type, dose-response relationship and biological plausibility, overwhelmingly support the existence of a causal relationship between passive smoking and lung cancer.

http://www.ncbi.nlm.nih.gov/pubmed/17267733

A meta-analysis in 2003 of data from 22 studies from multiple locations worldwide of workplace environmental tobacco smoke exposure and lung cancer risk.

The findings from this investigation provide the strongest evidence to date that exposure to environmental tobacco smoke in the workplace is associated with an increased risk of lung cancer

Health Consequences of Involuntary Exposure to Tobacco Smoke: A Report of the Surgeon General
http://www.surgeongeneral.gov/news/s...06272006a.html

I would like to draw your attention to several new conclusions that I have reached due to overwhelming scientific evidence.

• Secondhand smoke exposure causes heart disease and lung cancer in adults and sudden infant death syndrome and respiratory problems in children.
• There is NO risk-free level of secondhand smoke exposure, with even brief exposure adversely affecting the cardiovascular and respiratory system.
• Only smoke-free environments effectively protect nonsmokers from secondhand smoke exposure in indoor spaces.
• Finally, the Report concludes that, while great strides have been made in recent years in reducing nonsmoking Americans’ secondhand smoke exposure, millions of Americans continue to be exposed to secondhand smoke in their homes and workplaces.

http://skeptics.stackexchange.com/qu...moke-dangerous

Similar information can be obtained from the Centers for Disease Control (also see this Morbidity and Mortality Weekly Report), the Institute of Medicine, the journal Environmental Health Perspectives, the National Cancer Institute (part of the National Institutes of Health), and the Mayo Clinic.

A full list of research can be found at the MedLine, and it includes research from the American Heart Association, North Carolina Medical Journal, Current Opinions in Pulmonary Medicine, British Medical Journal, and Neurotoxicology and Teratology.