ClimateWire: The nation's third-largest carbon dioxide-emitting state is in the middle of a fierce election fight that could determine whether it stays on its current path of challenging U.S. EPA climate rules, or instead slows fossil fuel development and enters a regional carbon trading program.
In coal-reliant Pennsylvania, Republican Gov. Tom Corbett -- who has overseen the state's natural gas boom and called the EPA proposed carbon rule on existing power plants a "cap-and-trade tax" -- is facing a formidable...