Quote Originally Posted by daima
I Cannabis smoke however only effects the small airways of the lungs and and does not cause long term permanent damage. Many Marathon runners will use cannabis as a lung expectorant to clean their lungs of air pollution, dust, phlegm, etc etc.

I am very thankful that i never have to smokem anything but high quality cannabis/cannabis extracts.

dai*ma:stoned: sfca94110
I heard the opposite. That cannabis smoke only affects the large part of your lungs, where it easily passes through to the bloodstream, and doesn't affect the small bronchial passages, where you get bronchitis and other respiratory diseases.

This was done in 1981, but I've seen recent documentation where I got those exact words (cannabis smoke only affects the large part of your lungs, where it easily passes through to the bloodstream, and doesn't affect the small bronchial passages, where you get bronchitis and other respiratory diseases.)

There are many studies at http://www.ukcia.org , this one http://www.ukcia.org/research/medline/1.htm contains studies from 1981 to 1997.

Abstract
Bronchial challenge with histamine was used to assess bronchial reactivity in asymptomatic individuals who were long-term social smokers of marijuana. Their reactivity was compared to that of nonsmokers and asthmatics. Spirometry results were normal in the marijuana users. There was no significant difference in bronchial reactivity between marijuana smokers and nonsmoking controls, whereas the asthmatics demonstrated the expected hyperreactivity. These observations suggest that customary social use of marijuana may not produce abnormalities in airway function detectable by spirometry or bronchoprovocation.