Plain Dealer: Environmentalists are concerned that more Ohio endangered species could die unnecessarily in coming years as new natural gas lines are built — and especially if one company gets an unprecedented 50-year permit to work on future pipelines without hindrance. NiSource Inc., which delivers the fuel for Columbia Gas, is trying to acquire that half-century permit to allow for “incidental takings” of plants and animals protected under the federal Endangered Species Act as it maintains its …