TheOutkastDev
Knight
DontdroptheSOAD said:There is absolutely no evidence that second hand smoke can lead to cancer of any kind. Which would make sense, because even a hardcore smoker can after 10 years have perfectly healthy lungs barring they do not contract emphesyma (sp).
Why Is It a Problem?
Secondhand smoke is classified as a "known human carcinogen" (cancer-causing agent) by the US Environmental Protection Agency (EPA), the US National Toxicology Program, and the International Agency for Research on Cancer (IARC), a branch of the World Health Organization.
Tobacco smoke contains over 4,000 chemical compounds. More than 60 of these are known or suspected to cause cancer.
Secondhand smoke can be harmful in many ways. In the United States alone, each year it is responsible for:
* an estimated 46,000 deaths from heart disease in people who live with smokers but are not current smokers
* about 3,400 lung cancer deaths in nonsmoking adults
* other respiratory problems in nonsmokers, including coughing, phlegm, chest discomfort, and reduced lung function
* 150,000 to 300,000 lower respiratory tract infections (such as pneumonia and bronchitis) in children younger than 18 months of age, which result in 7,500 to 15,000 hospitalizations
* increases in the number and severity of asthma attacks in about 400,000 to 1 million asthmatic children
* increased incidence of middle ear infections in young children
Pregnant women exposed to ETS are also at increased risk of having low birth weight babies.
An issue that continues to be an active focus of scientific research is whether secondhand smoke may increase the risk of breast cancer. Both mainstream and secondhand smoke contain about 20 chemicals that, in high concentrations, cause breast cancer in rodents. Chemicals in tobacco smoke reach breast tissue and are found in breast milk.
The evidence regarding secondhand smoke and breast cancer risk in human studies is controversial, at least in part because the risk has not been shown to be increased in active smokers. One possible explanation for this is that tobacco smoke may have different effects on breast cancer risk in smokers and in those who are just exposed to smoke.
A report from the California Environmental Protection Agency in 2005 concluded that the evidence regarding secondhand smoke and breast cancer is "consistent with a causal association" in younger, mainly premenopausal women. The 2006 US Surgeon General's report, The Health Consequences of Involuntary Exposure to Tobacco Smoke, concluded that there is "suggestive but not sufficient" evidence of a link at this point. In any case, women should be told that this possible link to breast cancer is yet another reason to avoid contact with secondhand smoke.
The 2006 US Surgeon General's report reached several important conclusions:
* Secondhand smoke causes premature death and disease in children and in adults who do not smoke.
* Children exposed to secondhand smoke are at an increased risk of sudden infant death syndrome (SIDS), acute respiratory infections, ear problems, and more severe asthma. Smoking by parents causes respiratory symptoms and slows lung growth in their children.
* Exposure of adults to secondhand smoke has immediate adverse effects on the cardiovascular system and causes coronary heart disease and lung cancer.
* The scientific evidence indicates that there is no risk-free level of exposure to secondhand smoke.
* Many millions of Americans, both children and adults, are still exposed to secondhand smoke in their homes and workplaces despite substantial progress in tobacco control.
* Eliminating smoking in indoor spaces fully protects nonsmokers from exposure to secondhand smoke. Separating smokers from nonsmokers, cleaning the air, and ventilating buildings cannot eliminate exposures of nonsmokers to secondhand smoke.
http://www.cancer.org/docroot/PED/content/PED_10_2X_Secondhand_Smoke-Clean_Indoor_Air.asp
Lets do some research before we go and make baseless assertions.