A recent large epidemiological study showing that there is no link between even the heaviest marijuana smoking and lung cancer has received much publicity. The senior researcher Dr. Donald Tashkin is an unimpeachable source because up until now his work has been used to promote the idea of such a link. Apparently, there are still some honest men in science.

Over at The Trebach Report I have posted a short essay discussing the potential policy significance of this investigation.