EPA finally takes on abandoned coal ash ponds — but it might be too late

Last week, the EPA released a suite of long-awaited rules meant to cut down the carbon that the U.S. emits when generating electricity. The rules primarily target existing coal plants and new natural gas facilities, in many cases requiring dramatic emissions cuts that won’t be possible without an unprecedented deployment of carbon capture. (The new EPA proposals are part of an ongoing flurry of federal regulatory actions that must be issued by May 22 to minimize the possibility that they’ll be...