Marijuana is the most widely used illicit drug in the developed world yet little research, until now, has been done regarding its harmful effects. Researchers are now finding a link between long-term heavy cannabis use and shrinkage in certain areas of the brain.
The naive notion that smoking pot is harmless takes its toll on our society. Marijuana is not harmless and it is addictive. More young people are now in treatment for marijuana dependency than for alcohol or for all other illegal drugs combined.
via Arch Gen Psychiatry 2008;65(6):694-701, June 2008
via Office of National Drug Control and Policy
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