A new study finds that heavy marijuana use by adults could have extended-term effects on the brain. What types of effects? WSJ’s Jason Bellini has #TheShortAnswer.
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![](https://cbdmagnates.com/wp-content/uploads/2019/04/1555937525_maxresdefault-218x150.jpg "Gary Johnson Explains How "Marijuana Tends to make The Planet A Greater Spot"")
