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I feel confident that in this case we could identify this group of substances, and it would be worth almost any effort, by preliminary treatment, additives, or filtration, to get rid of it." Industry documents show that tobacco companies focused their safe-cigarette research on several areas, including the development of synthetic tobacco, boosting nicotine levels in low-tar cigarettes (so smokers wouldn't have to compensate for a loss of nicotine), and selective filtration of the most toxic substances in cigarette smoke, such as carbon monoxide

This equates to roughly 19 million Americans smoking blunts, and numbers have likely increased in the years since the survey data was analyzed

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Meanwhile, a 2021 market report of South Koreas vape market has highlighted that the countrys smoking rates have been decreasing thanks to such products