[20040915]RS21936_空气污染排放控制：现有技术和汞的共同利益.pdf

1 69 Fed. Reg. 4652-4752, January 30, 2004, and 70 Fed. Reg. 12398-12472, March 16, 2004.Congressional Research Service The Library of CongressCRS Report for CongressReceived through the CRS WebOrder Code RS21936September 15, 2004Air Pollution Emission Control: ExistingTechnologies and Mercury Cobenefitsname redactedAnalyst in Science and Technology PolicyResources, Science, and Industry DivisionSummaryThe Environmental Protection Agency (EPA) regulates the amount of pollutionemitted into the atmosphere by stationary combustion sources. To meet theseregulations, stationary sources use various techniques to reduce air pollutant emissions,including installing post-combustion emission control technologies. Some post-combustion technologies reduce the emissions of other pollutants besides the one forwhich they are designed. These concomitant reductions are called cobenefits. The EPAhas proposed regulating mercury emissions from coal-fired electric power plants byrelying on the results that these post-combustion emission control technologies achievethrough cobenefits. The appropriateness of using cobenefits to set emission limits, thereproducibility and reliability of cobenefits, and th