LAKE ELMO, Minn.—Inside a locked storage container near the Twin Cities, 200 gallons of concentrated PFAS await an executioner. The Minnesota Pollution Control Agency harvested the chemicals from a nearby aquifer and has invited companies to demonstrate an array of destructive technologies on samples of the liquid. The goal is to kill the PFAS, which have been linked to cancer and other health problems, by dicing up molecules that have some of the strongest bonds on Earth.

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