The Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) model is a tool that examines the life-cycle impacts of vehicle technologies, fuels, products, and energy systems. It provides a transparent platform through which energy and vehicle producers, researchers, and regulators can evaluate energy and environmental effects of vehicle technologies and energy and product systems.
GREET development and applications are an integral part of the mission of the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE). In addition to the Bioenergy Technologies Office (BETO), EERE’s other Sustainable Transportation Offices, the Vehicle Technologies Office and the Fuel Cell Technologies Office, use GREET.
Through BETO-funded projects, the Argonne National Laboratory (ANL) GREET Team develops a consistent model to advance understanding of sustainability of biofuels, bioproducts, and biopower, and produces high-quality, peer-reviewed analyses. Continually updated by researchers at ANL, GREET provides reliable calculations of life-cycle energy and emissions related to transportation, and accounts for a wide range of conventional and emerging energy systems and vehicle technologies.