Why was hemp illegal to cultivate in Canada in the past?
Hemp production was prohibited in Canada in 1938 under the Opium and Narcotic Drug Act as part of a combined international battle against the abuse of THC and other controlled substances. Although the prohibition was relaxed briefly during World War II when traditional sources of fibres were unavailable, the prohibition was renewed after the war. Since 1961, Health Canada has allowed limited production in Canada for scientific research purposes.
