Lung cancer is one of the most common forms of cancers. Lung cancer arises when a series of mutations in normal lung cells cause them to become abnormal and out of control. Lung cancer is the leading cause of cancer death In the United States in both men and women, but it is also the most preventable kinds of cancer. Almost 80% of all lung cancer deaths are thought to be caused by smoking tobacco. It is very rare for someone who has never smoked to be diagnosed with lung cancer. The risk for lung cancer among non-smokers is way lower than the risk of lung cancer in smokers. The more a person smokes and the more packs a person smokes a day, the greater the risk will be of being diagnosed with lung cancer. Cigar smoke and pipe smoke are almost as likely to cause lung cancer as cigarette smoking. Smoking low-tar or light cigarettes as an alternative to decrease the chances of the risk of lung cancer doesn’t help, considering the fact that these cigarettes increase the risk of lung cancer as much as regular cigarettes. There is also concern that menthol cigarettes could increase the risk even more, as the menthol has been known to allow smokers to breathe inhale more deeply. Secondhand smoke (breathing in the smoke from other smokers) is also a risk factor of lung cancer. Secondhand smokers have at least a 20% - 30% chance of being diagnosed with lung cancer. Secondhand smoke is thought to be the cause of over 3000 deaths from lung cancer a year. In my opinion this may be why smoking in public is nearly extinct. Radon which is an occurring radioactive gas that forms from the breakdown of uranium in soil and rocks. It can’t be smelled, seen, or tasted. According to the US Environmental Protection Agency (or the EPA) radon is the second leading cause of lung cancer, and it is the leading cause of lung cancer among non-smokers. There is so little radon outdoors to be considered dangerous, but indoors it can be more concentrated. When radon is breathed in it enters the lungs exposing them to small amounts of radiation, which in turn increases a person’s chance of lung cancer. The lung cancer risk from radon is much lower than that from tobacco smoke, but the risk from radon is