The study plays a major role supporting Taiwan EPA’s policy plan, the three main topics of this study are shown below: 1. Developing district-wide air pollutant emissions ceiling program: (1)Drafted district-wide air pollutant emissions ceiling program for Kaohsiung city/county and Pingtung county area : the goal of initial phase is to stabilize the total stationary sources’ emissions, the target emissions reduction from designated existing sources would be zero, major new sources or major modification from existing sources should be required to offset their increased emissions, or surrender their reduction commitments, while applying their installation and operation permits. (2)Amended the “The Criteria for the Recognition of the Pollutant Emissions of Existing Stationary Sources”：The Applicants could select their emissions to be authorized based on historical emission report, back to 7 years before the application date. The local authority shall recognize the applicants’ entire plants’ emissions based on their historical records. (3)Established ” the regulations for the recognition of the emissions reduction difference for banking, offsetting or trading.” : Those existing stationary sources that, as a result of the adoption of control measures, or reduction due to shut down, achieve actual emissions reduction quantities greater than designated reduction quantities may bank, offset or trade the difference after authorization by the local competent authority. (4)Furthermore, the study established emissions tracking system, and emission reduction credit (ERC) registry platform as well. (5)Finished the analyses of year 98 national emission control projects and established the guideline. 2. Drafted Fine particles PM2.5 control plan： (1) The national PM2.5/PM10 is about 0.47 ~ 0.63 from the data analysis of sampling stations. (2)The analyses of visibility and PM2.5 from Sinjhuang and Douliou sampling stations, the total volume concentration of fine particles rises, the scattering coefficient rises too；The main component of fine particles during fall and winter is organic carbon. (3)Compiled the SOx and PM monitoring data of Miaoli and Taichung, analyzed the correlation between low sulfate fuel oil and air quality. The seasonal influence is more significant than adopting low sulfate fuel control strategy.

Air pollutant emissions ceiling program, Emission Reduction Credits(ERC), Baseline emission approval, Designated reduction, Offset, Fine Particulate Matter(PM2.5)