how does smoking cigarettes cause lung cancer Smoking and Your Physical Health

Smoking and Your Physical Health Make Smoking History 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 All Forms of Cigarette Smoke Exposure are Harmful to our Cells and DNA Thirdhand Smoke Resource Center It's Never Too Late to Break Free from Smoking Cigarette causes lung cancer 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

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