how does tobacco cause lung cancer and | Cancer DYK: The primary cause of
DYK: The primary cause of lung cancer is tobacco smoking. Non smokers who are exposed to tobacco smoke are also affected and have a 30% increased risk of developing lung cancer. Learn more Smoking is the number one cause of lung cancer. It causes about 90% of lung cancer cases. Tobacco smoke contains many chemicals that are known to cause lung cancer. If you still Does smoking weed cause lung cancer? Lung cancer in never smokers a different disease Nature Reviews Cancer Health effects of smoking tobacco Wikipedia
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