The Environmental Protection Agency has admitted: Hydraulic fracturing of bedrock, or "fracking," causes earthquakes. There's no getting around it. As long as fracking is legal in the United States, the E.P.A. can only express a feeble, forlorn hope of "managing" the incidence of these earthquakes, or what they call "induced seismicity."
I think we need a federal law against fracking. Residents of Virginia or Maryland who've been living with earthquakes ever since this abomination was legalized in Pennsylvania can testify that the problems aren't confined to one state. If Pennsylvanians are too desperate for a fast buck to think clearly, the rest of us need to protect them from themselves.