It's time for a new discussion of Marijuana's risks

A major risk with cigarettes, heart disease, isn't clearly seen with pot smoking. Only two studies quantified the risk between marijuana use and heart attacks

The benefits and harms of medical marijuana can be debated, but more states are legalising pot, even for recreational use. A new evaluation of marijuana’s risks is overdue.

Last year, the National Academies of Sciences, Medicine and Engineering released a comprehensive report on cannabis use. At almost 400 pages long, it reviewed both potential benefits and harms. Let’s focus on the harms.

Cancer

The greatest concern with tobacco smoking is cancer, so it’s reasonable to start there with pot smoking. A 2005 systematic review in the International Journal of Cancer pooled the results of six case-control studies. No association was found between smoking