The REPEAT Project provides regular, timely, and independent environmental and economic evaluation of federal energy and climate policies as they’re proposed and enacted. From Congressional legislation to proposed regulations and executive actions, the REPEAT Project provides a detailed look at the United States’ evolving energy and climate policy environment and the country’s progress on the road to net-zero greenhouse gas emissions.

Led by the Princeton ZERO Lab (Prof. Jesse D. Jenkins, PI), in partnership with Evolved Energy Research and Prof. Erin Mayfield of Dartmouth College, the REPEAT Project employs a suite of geospatial planning and analysis tools coupled with detailed macro-energy system optimization models capable of rapidly evaluating policy and regulatory proposals at politically-relevant spatial resolutions (e.g., state, county, and sometimes finer resolutions). This includes evaluation of candidate sites for wind and solar development, thermal power plant siting and repowering, and transmission expansion as well as the impacts of the nation’s energy infrastructure on air quality and public health, and changes in energy sector employment. The REPEAT toolkit reflects further development and refinement of the models and methods used in the landmark Princeton Net-Zero America Study. Data and publications are intended to provide independent, timely, and credible information and analysis for broad educational purposes, including as a resource for stakeholders, decision-makers, and the media.

Funding for the REPEAT Project was provided by a grant from the Hewlett Foundation.