Chronic Pot Smoking Affects Brain Chemistry, Scans Show

so they're using the same methods proven to scare people with mdma in cannabis studies now? make a graphic in the right way and you'll find the infamous "holes in the brain"...
 
So does chronic stress, which is a leading killer in the U.S. Where's the study on that? Or known neurotoxins like lead, Thimerosal (mercury) or the gazillion other industrial chemicals in our food, water and air?

Another thing that affects brain function: aging. Only one way to avoid that.
 
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