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Tar from cigarettes Stock Image M870 0094 Science Photo Library The image of blackened lungs isn't a prop. It's the harsh reality of smoking. While healthy lungs are a pinkish color, cigarette smoke causes permanent, heavy staining from tar and other particulate How a two faced media covered cancer: Promoting researchand cigarettes The Cancer History Project 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 Health Effects of Smoking on Your Body What Is Tar in Cigarettes and How Does It Affect Health?

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