how does cigarette smoke cause cancer Smokeless tobacco and smoking: chemical mechanisms and prevention The Content – Science Education
The Content Science Education Enhances Knowledge (SEEK) 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 Cancers linked to tobacco use make up 40% of all cancers diagnosed in the United States CDC Online Newsroom CDC Smoking: Effects, Risks, Diseases, Quitting & Solutions
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