Risk factors for lung cancer:

• Smoking (including secondhand smoke) 

  • Responsible for 80-90% of cancer deaths 

  • 10% to 20% of lung cancers happen in people who never smoked or smoked fewer than 100 cigarettes in their lifetime.

• Radon

  • Number one cause of lung cancer in non-smokers

• Hazardous chemical exposure

  • Such as asbestos, uranium, arsenic, cadmium, chromium, nickel and some petroleum products​

• Particulate pollution

• Genetic factors

• Previous radiation therapy to lungs