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Technical Support Document for the Powerplant Impact Estimator Software Tool

The purpose of this report is to describe a software application, the Powerplant Impact Estimator (PIE), developed to estimate the health and economic of electric generating units (EGUs) in the United States.

In particular, we focus on the impacts in the years 2010, 2015, and 2020 of reducing ambient concentrations of particulate matter less than 2.5 microns in aerodynamic diameter (PM2.5) — an air pollutant that has been linked to a variety of serious health effects, including asthma attacks, chronic bronchitis, hospital admissions, and premature mortality.

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