More than a decade’s worth of studies have shown that supervised drug consumption sites prevent more drug overdose deaths. The idea goes like this: While in an ideal world no one would use dangerous and potentially deadly drugs, many people do. So it’s better to give these drug users space where they can use with some sort of supervision in case something goes wrong. It’s a harm reduction approach, and it’s been shown to lead to reductions in HIV transmissions as well as drops in emergency service call-outs related to overdoses.