Does marijuana hurt or help your brain? Scientists rush to study the drug's impact | Marijuana [W2Kvi1wpH1w]

Does marijuana hurt or help your brain? Scientists rush to study the drug's impact | Marijuana [W2Kvi1wpH1w]

| 1h 28m 28s | Video has closed captioning.

As 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. Stream your PBS favorites with the PBS app: Find more from PBS NewsHour at Subscribe to our YouTube channel: Follow us: Facebook: Twitter: Instagram: Snapchat: @pbsnews Subscribe: PBS NewsHour podcasts: Newsletters: #eastwood cbd gummies #cbdmd premium cbd gummies #ed cbd gummy #green life cbd gummies