Amna Nawaz
@PBSNewsHour·5.3M subscribers·62.2K videos
Does marijuana hurt or help your brain? Scientists rush to study the drug's impact | Marijuana
Posted
July 12, 2019
Views
236,289
Likes
3,222
Engagement
1.36%
July 12, 2019
236,289
3,222
1.36%
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5:58
9:22Now PlayingAs national attitudes and laws around cannabis use have evolved, so have the commercially grown strains of the plant. Some marijuana varieties today contain levels of THC, the drug’s psychoactive compound, as high as 50 percent, compared to around 5 percent a generation ago. But as science correspondent Miles O'Brien reports, the effects of cannabis on the human brain are still relatively unknown.
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