history of big tobacco Smoke gets in your eyes:

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Combine them, and they create a formidable combination that some will love and others will hate

However, marijuana that is smoked is often unfiltered, which can potentially lead to more damaging particles entering the airways and lungs. Combined marijuana and cigarette smokers were three to four times more likely to have airway wall thickening, which can lead to infections, scarring and further airway damage

95% CI, 2.25-2.38) and lifelong nondaily (HR = 1.82

Nicotine alternatives generate more than double the margin rate of combustible cigarettes