CNN Weed Dr. Sanjay Gupta Reports January 4, 2015 04:37:00
Better. and todays marijuana could be more addictive. it has more of the psychoactive ingredient thc than ever before. brain researcher dr. nora volkow. >> if you smoke a very potent marijuana, then the thc content is going to go very fast into your brain at relatively high concentrations, and then that increases its rewarding effects and likelihood of transitioning into addiction. >> so how much stronger is it? >> you see the barbed wire, obviously, on the fences. >> well, i traveled to mississ...
Source: archive.org