UCLA study shows lower risks of smoking cannabis compared to tobacco.

A new study from the University of California, Los Angeles found that smoking cannabis is not associated with chronic obstructive pulmonary disease (COPD) progression or development, unlike tobacco smoking. The study compared groups of people who currently, used to, or have never smoked marijuana and found no evidence of COPD progression or development in any of the groups. Cannabis advocates celebrated the findings, stating that they should reassure cannabis consumers and guide future public health policies.