Is Marijuana Addictive? Depends How You Define Addiction

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Mario Anzuoni / Reuters

California became the first state to legalize medical marijuana in 1996

Does marijuana cause addiction? As Californians prepare to vote on Prop 19 — which would legalize recreational use of the drug, at least under state law — the question is more pertinent than ever. Head over to Healthland for some experts’ opinions.

(See TIME’s photo gallery of cannabis conventions around the U.S.)