Even though many have said that secondhand smoke is harmful, since the effects are rarely talked about or seen, it is not as believable as an actual danger to your health. There are many commercials that target smokers and the effects of smoking on your health, such as the Truth commercials. However, there are not many commercials that show the effects of secondhand smoke. There are two kinds of secondhand smoke that can affect you, the first is side stream smoke, which is the smoke that is emitted from the end of a burning cigar or cigarette, the second is called mainstream smoke, which is the smoke that is exhaled by the smoker. Secondhand smoke contains 4,000 different chemicals compounds, which increase the risk of heart disease and cancer. Secondhand smoke contains numerous carcinogenic chemicals including formaldehyde, arsenic, ammonia, and hydrogen cyanide. Secondhand smoke causes 3,400 lung cancer deaths every year in adult non-smokers, as well as 22,000 heart disease deaths.