A new article in the Canadian Medical Association Journal says the THC potency in cannabis is five times higher than it was 20 years ago, which the authors say can lead to a higher risk of cannabis-induced psychosis. Read more: http://www.cbc.ca/news »»» Subscribe to CBC News to watch more videos: http://bit.ly/1RreYWS Connect with CBC News Online: For breaking news, video, audio and in-depth coverage: http://bit.ly/1Z0m6iX Follow CBC News on TikTok: https://bit.ly/3TnHioe Follow CBC News on