Sometime next month, underground miners will dig Germany’s last ton of black coal, load it onto a conveyor belt, and whisk it a mile to the surface of the Ibbenbüren mining facility. From there, the high-energy anthracite will be tossed into a high-combustion chamber in an adjacent power plant, where it will be converted into electricity to light up this northwest corner of Germany’s North Rhine-Westphalia state. It’s been a good run at the Ibbenbüren mine.