Marijuana (also known as weed, pot, hashish, reefer, etc.) is derived from the hemp plant, Cannabis sativa. The chemical substance found in the cannabis plant, tetrahydrocannibol (THC), is responsible for the plant’s psychoactive effect. The cannabis plant’s stems, leaves and flowering buds are the sources of marijuana. Due to the intoxicating qualities of marijuana, it has grown popular across the world as a recreational drug, and ...