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Cannabis 101 | National Geographic

Cannabis 101 | National Geographic

(gentle upbeat music) – [Narrator] Cannabis, it’s the most frequently used illicit substance in the United States and arguably, one of the most controversial. Cannabis, or marijuana, is a drug derived from certain strains of the plant cannabis sativa. The plant’s flowers and leaves contain chemical compounds called cannabinoids, which produce cannabis’s mind altering effects. This high is largely caused by the cannabinoid called tetrahydrocannabinol, or THC. When THC from cannabis is ingested or inhaled, it overwhelms the body’s natural…

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