A week after President Donald Trump declared the opioid crisis a public health emergency , Johns Hopkins Bloomberg School of Public Health experts and the Clinton Foundation released a report with suggestions for curbing the epidemic thats killing 90 Americans each day.

Among the collaborations top recommendations was a progressive suggestion: establishing safe consumption sites centers where drug users can go to consume or inject their drugs in a medically supervised environment.

Opponents of safe injection sites say they enable drug users . But proponents argue that they keep drug use out of public spaces, such as bathrooms and alleys, and also connect people to treatment options and medical professionals.

Meanwhile, it appears that strategies like cracking down on doctors opioid prescribing practices arent working. With less access to prescriptions, more Americans have turned to street drugs and are overdosing on heroin and the synthetic opioid fentanyl , according to the U.S. Centers for Disease Control and Prevention.

A very unintended consequence of stopping pill mills and the supply is that its a great boon for the heroin market, Susan Sherman, a professor at Johns Hopkins Bloomberg School of Public Health who was on the reports writing committee, told HuffPost. Its not like people stop [using drugs]. We dont have enough treatment slots.

The reports recommendation could spur U.S. policymakers to provide the sort of safe injection sites that Europe and Canada have benefited from for decades.

In terms of an investment in a public health endeavor, its a pretty high yield, Sherman said.