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The real evolutionary purpose was insect defense

Research , including findings from Public Health England, suggests that vaping is significantly less harmful than smoking because it avoids the combustion process that creates most of the dangerous toxins in cigarettes

Ethics declarations Competing interests The authors declare no conflict of interest

Smoke Versus Vapor Why The Method Matters Once you understand that combustion is a major reason smoking cannabis triggers cough, the next question becomes practical

Ventilate the whole area : You can also get rid of the old, lingering smoke smell of cigarettes by allowing good ventilation in your area