Fracking: where does the water go?

We all hear about hydraulic fracturing (fracking) injecting large volumes of water under extremely high pressures, miles deep, to create the little cracks that enable oil and/or gas to flow. But perhaps you’ve wondered where all that water actually goes. No really—you must have wondered, right, maybe before you fall asleep or in the middle of the night? Here is a study from the journal Groundwater that attempts to answer that puzzling question.