The Environmental Protection Agency is putting the finishing touches on its Clean Power Plan to reduce carbon emissions, but warnings against it are getting louder. Many who deal in the energy sector- grid operators, lawmakers, and especially the coal industry- are piling on to the idea that transitioning away from coal to renewables and natural gas will destabilize our power grid. In the latest installment of our series Blackout: Reinventing the grid, Inside Energy’s Leigh Paterson reports.