Abstract:Since the enactment of Kyoto Protocol GHGs mitigation has been a global issue. To fulfill the obligation many countries keen to develop new technology or implement economic incentive schemes to curtail CO2 emission. Among various emission mitigation policies, CO2 total emission target control is a common objective for every country to adopt. Taiwan, though not being a member of the Protocol, as a country of global world we need to fulfill our duty in the emission mitigation effort. It is therefore necessary for the government to design a feasible total emission target control policy to counteract the global warming. Owing to the importance of electricity supply sector in the contribution to the production of CO2 of the whole country how to achieve the emission target assigned for the sector is very important. The purpose of this paper is to investigate the feasibility and impact of the proposed total emission target control policies on the electricity supply sector. By applying the analysis of long term power plant expansion model we find that the target of Kyoto Protocol, i.e. the emission level of year 2010 back to that of 1990 and further reduced by 5.2%, is infeasible by the sector itself. However, if allow to relax the obligation by changing the targeting year to 2020 or 2025 the electricity supply sector can achieve its objective at the expense of relatively high cost of electricity generation. The average generation cost per kwh will increase by the range of 4% to 8%. CO2 emission rate per kwh will reduce from 0.54 kg to 0.41kg for the targeting year 2020 and to 0.44kg for the targeting year 2025. Nevertheless, this result relies heavily upon not only the efforts of the electricity sector but also the adoption by the government of many conclusions reached in the National Energy Conference. Therefore, we suggest that government should plan and implement various GHGs mitigation strategies required by the National Energy Conference.