Marijuana is the world's drug of choice. This is evident to travelers and entrepreneurs, as well as researchers parsing Erowid, the online drug encyclopedia. A group called Chemical Youth at the University of Amsterdam has just finished cataloguing all the personal testimonies on the site to get a snapshot of how people have been using drugs over the past decade and which drugs they've been using together. Turns out that cannabis plays well with others.
The research team was not specifically focused on cannabis itself. The group chose to track occurrences of the harder drugs, eliminating from their analysis over 10,000 descriptions of drug use that did not include one of the more substantial substances. So the data shows us that among people taking...
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