chief risk factor is smoking cigarettes Lung Cancer Factors How does smoking cause cancer?
How does smoking cause cancer? Cancer Research UK Teens Who Smoke Face Risk of Cardiac Damage by Their Mid 20s Smoking is the leading risk factor for lung cancer and is responsible for 80% of lung cancer deaths. Other risk factors include exposure to: second hand smoke hazardous chemicals Smoking cigarettes increases stroke risk in black adults Health effects of smoking tobacco Wikipedia
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