what chemical causes cancer in cigarettes Smokeless tobacco and cigarette smoking: mechanisms and prevention 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 How does smoking cause cancer? Cancer Research UK How Do Cigarettes Cause Cancer? Memorial Sloan Kettering Cancer Center Does Nicotine Cause Cancer? Dana Farber Cancer Institute Cigarettes contain thousands of chemicalsover 7,000 have been identifiedmany of which are toxic, and at least 70 are known to cause cancer. When a cigarette burns, these chemicals are inhaled deep

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