This study evaluates the CO₂ and air quality co-benefits of electrification scenarios in the United States by linking a detailed energy systems model (US-REGEN) and a full-form photochemical air quality model (CAMx). Results indicate that electrification substantially lowers CO₂ and improves air quality, with decarbonization policies amplifying these effects. Transport electrification improves ozone and PM₂.₅, but benefits vary regionally. Non-energy-related PM₂.₅ sources (fugitive dust, agriculture) can offset electrification benefits, highlighting the need for additional measures beyond CO₂ policy and electrification to meet air quality goals. The study demonstrates that commonly used marginal emissions approaches underestimate reductions from electrification.

John E. T. Bistline, Geoffrey Blanford, John Grant, Eladio Knipping, David L. McCollum, Uarporn Nopmongcol, Heidi Scarth, Tejas Shah, Greg Yarwood