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What makes you say they don't have proof? Please state your source.

Oh that's right, your source is your personal opinion. Here are some facts for you, with sources, you know, that thing you lack:

Fact #1: Secondhand smoke, also know as environmental tobacco smoke, is a mixture of the smoke given off by the burning end of a cigarette, pipe or cigar and the smoke exhaled from the lungs of smokers. It is involuntarily inhaled by nonsmokers, lingers in the air hours after cigarettes have been extinguished and can cause or exacerbate a wide range of adverse health effects, including cancer, respiratory infections, and asthma.

Source: California Environmental Protection Agency. Health Effects of Exposure to Environmental Tobacco Smoke. September 1997.

Fact #2: Secondhand smoke has been classified by the Environmental Protection Agency (EPA) as a known cause of cancer in humans (Group A carcinogen).

Source: U.S. Environmental Protection Agency. Respiratory Health Effects of Passive Smoking: Lung Cancer and Other Disorders. December 1992.

Fact #3: Secondhand smoke causes approximately 3,000 lung cancer deaths and 35,000-62,000 heart disease deaths in adult nonsmokers in the United States each year.

Source: California Environmental Protection Agency. Health Effects of Exposure to Environmental Tobacco Smoke. September 1997.

Fact #4: Secondhand smoke is especially harmful to young children. Secondhand smoke is responsible for between 150,000 and 300,000 lower respiratory tract infections in infants and children under 18 months of age, resulting in between 7,500 and 15,000 hospitalizations each year, and causes 1,900 to 2,700 sudden infant death syndrome (SIDS) deaths in the United States annually.

Source: California Environmental Protection Agency. Health Effects of Exposure to Environmental Tobacco Smoke. September 1997.


Here are some more handy dandy little facts so you don't have to talk out your ass anymore: Secondhand Smoke Fact Sheet