By Government of Alberta, Agriculture and Rural Development
Industrial hemp (Cannabis sativa) is one of the oldest cultivated plants in the world. The species was banned in North America in late 1930s because its leaves and flowers contained a hallucinogenic drug known as delta-9 tetrahydrocannabinol (THC). It was banned internationally in 1961 under the United Nations’ Single Convention on Narcotic Drugs. Hemp does suffer from the “snicker factor”, largely because of its hippy-dippy image and close association with marijuana, its conscious-altering cousin.