This report provides a review of the active UNDP-GEF wind energy portfolio. It looks at the design, costs and efficiency of existing projects, drawing on the experience of 14 wind energy projects that have been financed through UNDP to help national governments implement wind energy public policies. It includes a detailed analysis and recommendations for future projects on prioritizing countries, choosing types of policies and designing mechanisms. The Clean Development Mechanism (CDM), for example, emerges as a possible way of increasing revenues of wind energy projects.