The Technology Path to Deep Greenhouse Gas Emissions Cuts by 2050: The Pivotal Role of Electricity

TLDR

Several states and countries have set deep greenhouse gas reduction targets for 2050, yet physically realistic modeling of the required energy and economic transformations remains scarce. The study examines the infrastructure and technology pathway needed to achieve California’s 80 % reduction below 1990 levels. This examination employs detailed modeling of infrastructure stocks, resource constraints, and electricity system operability. The analysis shows that energy efficiency and decarbonized supply alone are insufficient; widespread electrification of transportation and other sectors is necessary, with decarbonized electricity becoming dominant, demanding non‑commercialized technologies and coordinated investment, development, and deployment.

Abstract

Several states and countries have adopted targets for deep reductions in greenhouse gas emissions by 2050, but there has been little physically realistic modeling of the energy and economic transformations required. We analyzed the infrastructure and technology path required to meet California's goal of an 80% reduction below 1990 levels, using detailed modeling of infrastructure stocks, resource constraints, and electricity system operability. We found that technically feasible levels of energy efficiency and decarbonized energy supply alone are not sufficient; widespread electrification of transportation and other sectors is required. Decarbonized electricity would become the dominant form of energy supply, posing challenges and opportunities for economic growth and climate policy. This transformation demands technologies that are not yet commercialized, as well as coordination of investment, technology development, and infrastructure deployment.