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A lot of cancer is caused by environmental factors. Tobacco smoke is the leading contributor to small cell lung cancer. Inhaling fumes from frying is the leading contributor to large cell lung cancer. Breathing in asbestos or sand also causes cancer. Plutonium causes cancer. The bacterium that causes stomach ulcers eventually causes cancer. Getting rid of that bacterium can lead to acid reflux which can cause cancer. Two viruses can cause cancer.

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15y ago

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