In some places in Europe, marijuana products with more than 15 percent THC is considered hard drugs, and illegal to use or sell.
Dr. Martien Kooyman of the Netherlands said the following about the truth of today’s pot:
“The cannabis grown and sold today is not same drug as was available in the 1970s. The average THC has increased to more than 15%. Cannabis issue can clearly lead to addiction. The damage to the brain from chronic use is worse compared with chronic use of heroin. Among the negative effects of long-term cannabis use in adolescence include neuro-psychological dysfunction, decline in IQ, short memory, among others.”