Marijuana legalization now enjoys majority support in the U.S. — 52 percent of Americans support legalization, 42 percent oppose it, and 7 percent remain undecided, according to the latest General Social Survey.

But most changes to marijuana law aren’t happening at the federal level, they’re happening in the states. In some, possession and use remains a crime. Other states have decriminalized possession of small amounts, 24 have legalized marijuana for medical use, and 4 states plus Washington, D.C., have gone fully legal. There are as many shades of grey (or green) between these policies as there are states.

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