There’s Still So Much We Need to Learn About Weed—and Fast


On Friday, US senator Ron Wyden (D-Oregon) introduced legislation to legalize marijuana at the federal level—a bill called SR 420, of course. Thirty-three states and the District of Columbia have so far expanded access to weed in some form. But with federal law lagging behind, the states have landed in a tangle of rules that are at times contradictory, self-defeating, and lacking in scientific support.

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