Cannabis is known for its pharmacological
properties for centuries. It got recognized as a medicine only in the
nineteenth century. Still it is used in several parts of the world, like the
Middle east, Southern Africa and Asia. A genus of three species (sativa, indica, and ruderalis),
Cannabis has an old history of cultivation and use for physical and mental
disorders and as a recreational drug. In the 20th century it got
banned in many countries of the world.
