Possession limits, criminal offences, public health, impaired how to open medical marijuana dispensaries driving, medical cannabis, education, taxation, home cultivation, advertising, production There are over 800 companies licensed to sell or process cannabis in Canada. According to some industry analysts, the offer surplus contributed to the oversupply of cannabis in the market. While that figure may also demonstrate a successful transition from the illegal to the legal market, some experts see the industry's current state as unsustainable and leading to heavy consolidation. The study is part of Dr. Callaghan’s ongoing research assessing the potential harms and benefits of cannabis legalization on key Canadian public health outcomes, such as youth health, cannabis-related emergency department utilization, cannabis-induced psychoses, and motor vehicle collisions.