The influence of energy-supply structure on emission-reduction costs f
or SO2 is outlined and evaluated. For this purpose, eight representati
ve countries have been selected for analysing impacts due to different
energy scenarios varying in final energy demand, fuel prices, assumed
CO2-emission reduction, and country-specific factors. We identify and
quantify emission-reduction potentials of a restructuring of national
energy systems and energy-conservation measures, as well as impacts o
n emission-reduction costs. These results are country-specific and are
therefore important for ongoing negotiations of international protoco
ls on reductions of SO2.