What is cannabis and how does it work?

What is Cannabis?  When you look up the word “cannabis” in the Encyclopedia Brittanica, here’s what you’ll find:   Cannabis, (genus Cannabis), genus of medicinal, recreational, and fibre plants belonging to the family Cannabaceae. By some classifications, the genus Cannabis comprises a single species, hemp (Cannabis sativa), a stout, aromatic, erect annual herb that originated in Central Asia and is now cultivated worldwide. A tall canelike variety is raised for the production of hemp […]