Cannabis, also known as marijuana or ganja (from Hindi: गांजा gānjā), is a psychoactive product of the plant Cannabis sativa. The herbal form of the drug consists of dried mature flowers and subtending leaves of pistillate ("female") plants. The resinous form, known as hashish, consists primarily of glandular trichomes collected from the same plant material. The major biologically active chemical compound in cannabis is Δ9-tetrahydrocannabinol (delta-9-tetrahydrocannabinol), commonly referred to as THC.
Humans have been consuming cannabis since prehistory, although in the 20th century there was a rise in its use for recreational, religious or spiritual, and medicinal purposes. It is estimated that about four percent of the world's adult population use cannabis annually and 0.6 percent daily. The possession, use, or sale of psychoactive cannabis products became illegal in most parts of the world in the early 20th century. Since then, some countries have intensified the enforcement of cannabis prohibition while others have reduced the priority of enforcement.
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