Cannabis smoke exposure, even long-term, is not positively associated with chronic obstructive pulmonary disease (COPD), lung cancer, or irreversible airway damage, according to a literature review published in the journal Breathe.

“The long-term respiratory effects of cannabis differ from traditional smoking,” authors concluded. “[C]annabis smoking does not appear to be carcinogenic.”

Authors also acknowledged that vaporizing cannabis – a process which activates cannabinoids, but does not heat them to the point of combustion – reduces many of these symptoms.

See the original article from The Daily Chronic