摘要: The Emission Inventory Branch (EIB) of the U.S. Environmental Protection Agency(EPA) is responsible for compiling and maintaining national emission data for the criteria pollutants. To that end, EIB produces, estimates of the annu... 展开 The Emission Inventory Branch (EIB) of the U.S. Environmental Protection Agency(EPA) is responsible for compiling and maintaining national emission data for the criteria pollutants. To that end, EIB produces, estimates of the annual national air pollutant emissions for five major pollutants: carbon monoxide (CO), nitrogen oxides (NOx), lead (Pb), particulate matter less than 10 microns (PM-10), sulfur dioxide (SO2), and volatile organic compounds (VOC). In addition, total particulate matter (TSP) has been estimated in the past. The 1994 Trends Procedures Document is an accompanying document designed to describe the methodology and procedures used to create the emission estimates presented in the 1994 Trends Reports. The emissions estimating methodologies fall into three major categories: 1900-1939 Methodology, 1940-1984 Methodology, and 1985-1993 Methodology. The methodology used to make specific estimates depends on the pollutant and the time period. 收起