Columbia University Medical Center
Ranked #1 in Psychiatry
U.S. News & World Report
Ranked #1 in Research Funding
National Institutes of Health
NewYork-Presbyterian Hospital The University Hospital of Columbia and Cornell
Not Your Father's Weed? Marijuana Potency Stronger Than Ever
August 9, 2013 - August 12, 2013

"There have always been high-THC content cigarettes around," says Carl Hart, a neuroscientist at Columbia University who studies the physical effects of cannabis and other drugs. "The modest increases that we see today are not as concerning as has been made out to be."

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