A two-pack-a-day smoker is smoking forty cigarettes. A weed smoker is smoking, what, maybe the equivalent of two? I've no doubt on a puff-for-puff basis weed

A two-pack-a-day smoker is smoking forty cigarettes. A weed smoker is smoking, what, maybe the equivalent of two? I've no doubt on a puff-for-puff basis weed is just as bad or worse. But quantity matters.