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→Secondhand Smoke
== Secondhand Smoke ==
== Secondhand Smoke ==
''Secondhand smoke'' refers to smoke that is inhaled by nonsmokers from the environment. It is a combination of smoke given off by cigarettes and other smoking implements that is not inhaled by smokers, as well as the smoke exhaled by smokers. The U.S. [[Environmental Protection Agency]] has classified secondhand smoke as a [[Group A carcinogen]], meaning that it is known to cause cancer in humans. It has been reported that secondhand smoke causes 3,600 annual lung cancer deaths and between 22,700 and 69,600 heart disease deaths annually in the U.S.<ref>California Environmental Protection Agency (2005, June). Health Effects of Exposure to Tobacco Smoke.</ref>. According the the [[Surgeon General]], even short-term exposure to secondhand smoke can have harmful effects on cardiovascular functioning<ref>The Health Consequences of Involuntary Exposure to Tobacco Smoke: 6 Major Conclusions of the Surgeon General Report. A Report of the Surgeon General, U.S. Department of Health and Human Services, 2006. Retrieved from [http://www.surgeongeneral.gov/library/secondhandsmoke/factsheets/factsheet6.html]</ref>.
== References ==
== References ==
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