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Documentary revealing the science of marijuana, a plant containing 400 active chemicals and compounds that is one of the most widely-used illicit drugs in the world. Despite marijuana being illegal in most countries, the widely used drug is considered by scientists to be one of our most interesting plants.

Watch the full National Geographic: Super weed movie online at no cost in high-definition (HD) quality. No downloads needed—simply click to play and experience the excitement with English subtitles included for your convenience.