New York Times: If negotiators in Paris reach an agreement next week on a global plan to rein in the use of fossil fuels, the next question becomes this: How can the participating countries fulfill their pledges to do their part? They may get some direction from Germany, which has claimed some early success in diversifying its energy sources and balancing economic growth with environmental concerns. Many other nations and political and business leaders had scoffed when Germany set out to make the transition from...