Sep 5 Environment While ‘Zombie’ Mines Idle, Cleanup And Workers Remain In Limbo Instead of properly closing these mines, their owners are idling them indefinitely. By Mark Olalde, Center for Public Integrity and Joe Yerardi, Center for Public Integrity Sep 5 Environment While 'Zombie' Mines Idle, Cleanup And Workers Remain In Limbo Mark Olalde, Center for Public Integrity and Joe Yerardi, Center for Public Integrity