carcinogenic ingredients in cigarettes Cigarette smoke contains thousands of chemicals, many of which are toxic and harmful to the human body. Here's a detailed breakdown of some of the most dangerous constituents and their effects: 1 Cigarette Tar | PMI Science

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Young people 16-24-year-olds spend even more time, clocking up about 3 hours per day

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Western states like California (10.0%) and Utah (7.9%) have the lowest rates