Lung Cancer - Causes

causes LungCancerLung cancer develops for a number of reasons, and in some cases the cause of the cancer is not clear. However, about 80% of lung cancer cases are due to smoking- smokers are at least 10 times more likely to develop lung cancer than non-smokers. In addition, exposure to asbestos, radiation and radon gas are also believed to increase the risk. People who have long-term lung problems and those who are exposed to passive cigarette smoke may also be at greater risk of lung cancer.