Awareness in Central and Eastern European countries of environmental problems is growing rapidly. Yet the social, economic: and political barriers to implementing drastic policy measures are still formidable. The acceptability of policy measures can be improved when the environmental and economic implications of alternative measures are shown in conjunction. Therefore, a prototype Computable General Equilibrium (CGE) model is constructed for Lithuania. A key question in Lithuania concerns the future use of nuclear-generated power. Using the CGE model, medium-term scenarios describing combinations of high or low economic activity, fuel prices, and nuclear potential are run for the year 2000. (C) 2000 Society for Policy Modeling. Published by Elsevier Science Inc.