Smoking is not the only factor that increases a person's risk of developing lung cancer. There are several factors that increase a person's risk of developing lung cancer,

Air pollution is another factor that can increase the risk of lung cancer. Other than that, if someone lives in an area that is high in carcinogens can also increase the risk of this cancer. For example living near a factory or mining, Other risk factors that can increase the risk of lung cancer are a history of cancer in the family. Then, people who are 40 years and above are also susceptible to lung cancer.

Although there are many risk factors, exposure to cigarette smoke, both active and passive smokers, is the highest risk factor for lung cancer.