Not your grandfather’s marijuana

Not your grandfather’s marijuana
"...Thanks to recreational marijuana legalization, we are steadily deciding as a nation that widespread availability of marijuana is worth the mental-health risk to our youth, the medical evidence for which is growing stronger every year.
...So why make marijuana use a big deal now?
...the big issue here is that marijuana is much more potent now.
Today’s marijuana has been hybridized by specialty farmers into an incredibly powerful mind-altering drug.
A study labeled the “Functional Consequences of Marijuana Use in Adolescents” found that the average THC content of marijuana has increased from an estimated one percent in the 1960s, to just under three percent in the 1990s, to almost 13 percent today.
Recent studies found that adolescent marijuana users demonstrated poorer performance on tests of attention, verbal learning/memory, sequencing, and psychomotor speed compared to non-using adolescents.
At least until the early or mid-20s, "the brain is still under construction," says Staci Gruber, PhD, Harvard neuroscientist and director of the Cognitive and Clinical Neuroimaging Core..."
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