what in cigarettes causes lung cancer The harmful chemicals smoking directly damage cells, causing DNA mutations that increase risk. Over time, these damaged cells grow abnormally, leading to tumor formation in the lungs. Quitting smoking 10 Harmful Effects of Cigarette
10 Harmful Effects of Cigarette Smoking on the Respiratory System Tobacco and Cancer: A smoking gun? Ronny Allan Living with Neuroendocrine Cancer Preventing Chronic Disease: April 2007: 06_0024 How Do Cigarettes Cause Cancer? Memorial Sloan Kettering Cancer Center The Content Science Education Enhances Knowledge (SEEK)
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