Jeffrey is an expert in alternative transportation fuel policies, focusing on the Renewable Portfolio Standard, California Low Carbon Fuel Standard (LCFS), and Oregon Clean Fuels Program (CFP). His work focuses on the regulatory, technical, and economic drivers for conventional and alternative fuels and advanced vehicle technologies.
Jeffrey has a deep understanding of the cost and environmental implications of alternative transportation fuels and technologies. He has performed technical assessments of alternative fuels and vehicles, developed production and refueling infrastructure assessments, performed lifecycle (or well-to-wheel) analyses of the greenhouse gas impacts of transportation fuels, and quantified the air quality impacts of vehicles in the light-duty and heavy-duty sector. Jeffrey has submitted both LCFS and CFP carbon intensity pathways for approval. These pathways have included landfill gas, manure, and other anaerobic digester feedstocks; wastewater treatment for renewable natural gas and hydrogen production; and waste feedstocks to liquid biofuel production.
Jeffrey led a study for the California Electric Transportation Coalition comparing medium- and heavy-duty (MD/HD) technologies from a total cost of ownership standpoint. He developed technology implementation scenarios to understand the emissions benefit potential from MD/HD electrification and the necessary penetration levels to meet air quality standards and emission goals. The report also contains an economic impact analysis of MD/HD electrification, including employment and economy-wide impacts.
- Jan Lewandrowski, Jeffrey Rosenfeld, Diana Pape, Tommy Hendrickson, Kirsten Jaglo and Katrin Moffroid. (2020). The greenhouse gas benefits of corn ethanol – assessing recent evidence. Biofuels, 11:3, 361-375, DOI: 10.1080/17597269.2018.1546488.
Rosenfeld, J., M. Kaffel, J. Lewandrowski, D. Pape. (November 2020). The California Low Carbon Fuel
- Standard: Incentivizing Greenhouse Gas Mitigation in the Ethanol Industry. USDA, Office of the Chief Economist.
- (December 2019). Comparison of Medium- and Heavy Duty Technologies in California. CalETC Research Website.