Aviation Emissions and Air Quality Handbook  99$_{ }$ DOE  Department of Energy  DOT  Department of Transportation  EA  Environmental Assessment  EDMS  Emissions and Dispersion Modeling System  EERE  DOE Office of Energy Efficiency & Renewable Energy  EIAP  Environmental Impact Analysis Process  EIS  Environmental Impact Statement  EO  Executive Order  EPA  Environmental Protection Agency  FAA  Federal Aviation Administration  FHWA  Federal Highway Administration  FONSI/ROD  Finding of No Significant Impact/Record of Decision  FTA  Federal Transit Administration  GA  General Aviation  GAO  General Accounting Office  GCRP  Global Change Research Program  GHGs  Greenhouse Gases  GPU  Ground Power Units  GSE  Ground Support Equipment  GWP  Global Warming Potential  H$_{2}$O  Water Vapor  HAPs  Hazardous Air Pollutants  HC  Hydrocarbons  HFCs  Hydrofluorocarbon  ICAO  International Civil Aviation Organization  INM  Integrated Noise Model  IPCC  Intergovernmental Panel on Climate Change  IRIS  Integrated Risk Information System  ISR  Indirect Source Review  LOB/SOs  Lines of Business and Staff Offices  LOS  Level-of-Service  LPG  Liquefied petroleum gas  LTO  Landing-takeoff cycle 