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About _____ percent of the lung cancer deaths worldwide, and _____ percent in industrialized nations, are caused by cigarettes.

User Mslugx
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About 70 percent of the lung cancer deaths worldwide, and 90 percent in industrialized nations, are caused by cigarettes.
Ciiggarates contain 43 cancer causing substance, including a huge amount of Nitrosamines, which is known as one of the most potent carcinogens (cancer-causing substances known to men)
User Kyle Stoflet
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