The primary goal behind the development of a GIS for the U.S. EPA's Acid Rain Program is to gain a thorough understanding of the impacts of sulfur dioxide and nitrogen oxide emission reductions to the environment. The decision to implement a GIS stemmed from a need to better understand the implications of policy questions regarding acid rain control and therefore to improve the decision making process. GIS is a unique analysis tool to support this effort by visually integrating environmental, ecological, and other data to assess the overall impacts of emission reductions that are national or regional in nature.
U.S. Environmental Protection Agency
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