The U.S. government is growing the largest crop of research marijuana in five years, responding to interest in varieties with high levels of THC and CBD. Scientists have asked for weed that more closely matches what’s sold in states that have legalized medical or recreational marijuana, the National Institute on Drug Abuse said in an email.

The federal agency said it plans to grow 2,000 kilograms (4,409 pounds) this year at the University of Mississippi, which holds the sole federal contract for producing marijuana. That’s enough for 5 million joints, although the government provides the marijuana in different forms.

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