Only at levels of marijuana smoking higher than this did the researchers see a leveling off and then potential reversal of this relationship to improved lung capacity. (scientificamerican.com)
«Very similar compounds are being released in marijuana smoke as in tobacco smoke,» he said. (health.com)
Another potentially problematic aspect of marijuana is the free radicals generated in the smoke, but again there's good news: marijuana smoke contains far less free radicals than tobacco smoke. (supernaturalacnetreatment.com)