Scientists welcome new rules on marijuana, but research will still face obstacles

For decades, researchers in the U.S. had to use only marijuana grown at a facility located in Oxford, Mississippi. A few other approved growers have been added in recent years. (Brad Horrigan/Hartford Courant/Tribune News Service via Getty Images)

As the Biden administration moves to reclassify marijuana as a less dangerous drug, scientists say the change will lift some of the restrictions on studying the drug.

But the change won't lift all restrictions, they say, neither will it decrease potential risks of the drug or help users better understand what those risks are.