Cannabis 101 | National Geographic

Cannabis is the most frequently used illicit substance in the United States. Find out about the history of marijuana use, the chemistry behind a “high”, and the possible dangers and benefits of cannabis.

About National Geographic: National Geographic is the world’s premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what’s possible.