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Plus, studies reviewed by the EPA have shown that low levels of ozone dont effectively destroy indoor pollutants

In this experiment, increasing puff volume significantly raised THC levels in the blood and behavioral effects, while longer breath-holding slightly increased THC levels but did not enhance behavioral effects

Effect of cannabis smoking on lung function and respiratory symptoms: a structured literature review

Cigarette companies also introduced ventilation holes in cigarette filters so that cigarettes would look healthier on paper

Activated charcoal filters for joints & cigarettes reduce tar, fine dust and other harmful substances from the smoke, while at the same time ensuring a cooler and more pleasant smoking experience