The "Environmental Manual for Power Development" (EM in short) is a computerized tool for the inclusion of environmental and cost data into the decision-making for energy projects, especially in Developing Countries. Its key features are:

• A database which handles relevant information on energy projects, including references for data sources, and data quality indicators
• A scenario module in which a variety of energy systems can be compared
• An analysis module in which results from scenario runs can be determined
• A graphics module to show results, and emission/cost tradeoffs
• An interactive online-help system which includes user help, user guide, and data and model documentation.