A new analysis finds loose rules and a lack of regulation have contributed to more Oregon medical marijuana being sold on the black market.
The analysis was done by the Oregonian.
It found almost 40% of Oregon marijuana seized nationally, on drug trafficking routes, had a connection to the medical marijuana program.
Cannabis supporters like Lori Duckworth said there needs to be more regulation, where farms are regularly inspected for compliance.
The analysis also discovered more than a dozen large-scale operations -- trafficking hundreds of pounds of Oregon marijuana to at least seven states.