The paper gives updated details of major flue gas desulfurization (FGD) and nitrogen oxide (NOx) control installations in the Federal Republic of Germany (West Germany) for coal-fired boilers. The paper reviews applicable government regulations limiting stack emissions, provides an understanding of the principal types of control system designs that have been applied, outlines technological advancements that have been achieved, and reviews experience gained to date in recent expanded use of FGD and NOx control facilities in Europe. Significant differences from FGD service and practice in the U.S. and Japan are described, and specific information is offered that may help improve the design, operation, and reliability of new and retrofit FGD installations in the U.S.