What if the toxic metalloid arsenic extracted from water treatment processes could be upcycled for economic use? What if this upcycling could benefit marginalized communities most affected by toxic pollution? The questions today are not what if, but when, thanks to seminal work recently reported in Science Advances on commodifying the critical raw material arsenic from groundwater. A novel chemical method developed with measurements from MAX IV’s Balder beamline lays the path to produce amorphous metallic arsenic As(0), valuable in alloys and clean energy systems such as batteries and high-speed electronics, namely semiconductors.