Yet there are ways to manage the threat, U.S. Geological Survey scientists Arthur McGarr and William Ellsworth and several colleagues argue in an article in Science last week. It would be wise, for example, to keep wastewater wells away from cities. And it's important to monitor seismicity more precisely. By finding out exactly where small quakes are happening, it may be possible to map any larger faults that wastewater injection is nudging to life. At the same time, oil and gas drillers should report publicly where they're drilling wells, how much water they're injecting and how deeply.