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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.
The government is the only source of cannabis for nearly all research in the U.S., while it still considers it illegal and dangerous.
Scientists have asked for marijuana 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 Thursday to The Associated Press.
