how does smoking cigarettes cause lung cancer Cigarette Is the Main of The harmful chemicals in smoking
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 Smoking: The Main Cause of Lungs Cancer Winter Lung Cancer Causes: Indoor Air Pollution and 7 Other Dangerous Risk Factors of Lung Cancer Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Smoking & Lung Cancer: How Cigarettes Damage Your Lungs All Forms of Cigarette Smoke Exposure are Harmful to our Cells and DNA Thirdhand Smoke Resource Center
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