Across the Atlantic Ocean, governments and businesses are taking big steps toward renewable energy. Their transition could provide lessons for Kentucky.
This is the second in a five-part series. Read the others here.
In Western Germany, only a 45-minute drive from the tourists milling around the iconic cathedral in Cologne, miners work in three immense lignite coal mines. Machines rumble, digging the soft, brown coal out of the ground and placing it on conveyor belts.