how does smoking cigarettes cause lung cancer Tobacco and Cancer | Cancer
Tobacco and Cancer Cancer CDC The harmful chemicals in smoking directly damage lung cells, causing DNA mutations that increase cancer risk. Over time, these damaged cells grow abnormally, leading to tumor formation in the lungs. Quitting smoking 16 cancers that can be caused by smoking Cancer Council NSW Stopping smoking could halt further damage to lungs CRUK CC No smoking day: Here's what smoking a cigarette actually does to your body Metro News Smoking: The Main Cause of Lungs Cancer
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