New studies suggest that even a small amount of second-hand smoke can cause life-threatening changes to a non-smoker's circulatory system. A study done by Pennsylvania Alliance to Control Tobacco says that: "Tobacco smoke pollution contains several thousands of chemicals, including: two-hundred poisons, and more than fifty chemicals that cause cancer. From a public Amway2 health standpoint, there is no debate over the importance of clean indoor air. Tobacco smoke pollution exposure is a serious health risk to all adults and children" (PA alliance).
According to Alex Fir, "Second-hand smoke or ETS (Environmental Tobacco Smoke) is a combination of side stream smoke coming straight from the burning tobacco and the mainstream smoke that is exhaled by the smoker. It comprises of over 4,000 chemical constituents, a large portion of which are the inducers of respiratory illness and around forty are known or suspected carcinogens. About seventy to eighty
Cited: Reinberg, Steven. "Second-hand Smoke Increases Heart Risks." Health Day.com 23 May. 2005. Messmer, John. "The Medical Minute: Second-hand Smoking." live.psu.edu. 21 April. 2005. Kerlik, Bobby. "PA Senator Proposes Statewide Bar and Restaurant Smoking Ban." No-smoking.org. 21 July. 2004. Brundtland, Gro Harlem. "WHO Calls for Worldwide Ban on Public Smoking." cancer.org. 19 June. 2001. Pennsylvania Alliance to Control Tobacco. Clean Indoor Air. 23 Nov. 2005.