The U.S. has a complicated history with cannabis. Designated an illegal substance for decades, in recent years we’ve witnessed a greater understanding of its medicinal potential with a growing number of states legalizing it for that purpose, as well as for recreational use. However, federally it remains classified as an illegal “Schedule 1 drug” under the Controlled Substances Act. I guess it’s still pretty complicated. Last year however, a bill passed in the House of Representatives that would have legalized the use of cannabis federally (but died in the Senate). In addition, more senators and representatives on both sides of the aisle are expressing an interest in decriminalizing cannabis use, so it looks like things will continue to change.  Joining me to share some insight on what the future could hold for cannabis use in the U.S. – including the impact of legalized stores on overall cannabis usage and user numbers – is Michael Armstrong with Brock University in Ontario, Canada, where cannabis use was legalized three years ago.