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PBS NewsHour: The Green Rush: #2 – Does Marijuana help or hurt the brain? Scientists rush to study impact


These last few days PBS NewHour has been running segments, under the series title – The Green Rush, about aspects of the legalisation of Cannabis in various US States. Given the referendum proposed for NZ i am posting these segments on the blog as they may provide people with some useful information.

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.

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