Zap Rocks. Add Water. Get Clean Hydrogen
In a tranquil Boston suburb , on the far edge of a horse farm, where pasture gives way to woods, a crane lowers an enormous electrode into a borehole. The electrode, a half-meter-long cylinder with copper-tipped arms to ensure good contact with the borehole walls, descends—deeper, deeper—through layers of spongy sandstone to the hard, marbled roots of an ancient mountain range hundreds of meters…
We haven't written up this one. IEEE Spectrum has the full story — the link below goes straight to it.