Although we often think of the medical consequences that result from the direct use of tobacco products, passive or secondary smoke also increases the risk of many diseases. Tobacco smoke is a major source of indoor air pollutants; secondhand smoke is estimated to cause about 3,000 lung cancer deaths among non-smokers per year and contributes to more than 35,000 related deaths With cardiovascular disease. Exposure to household tobacco smoke is also a risk factor for new cases and a greater severity of childhood asthma. In addition, cigarettes dropped are the leading cause of deaths from residential fires, leading to more than 1,000 deaths each year.
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