Analytical studies have been made to identify the technical and economic factor that will govern future selection of fuel cleanup processes and advanced-cycle central power stations which, in combination, will be capable of producing electric power at the lowest possible cost while reducing substantially the emissions of sulfur oxide pollutants resulting from the combustion of high-sulfur coal and residual fuel oil. The technical approach was based upon technology currently available, but possibly not reduced to commercial practice as well as technology judged attainable for commercial use within the next ten and twenty years. This approach included evaluations of current and projected; fossil-fuel desulfurization and conversion processes, current and advanced-cycle central power stations, and integrated fuel cleanup and power stations. (APCO abstract)