U.S.: government issues GREET model guidelines to assess biofuels feedstock sustainability

On January 15, 2025, the U.S. Department of Energy (DOE) released an updated version of the Greenhouse Gases, Regulated Emissions, and Energy Use in Technologies (GREET) model, introducing stricter guidelines for calculating the life cycle greenhouse gas (GHG) emissions of transportation fuels. This updated model supports the Clean Fuels Production Credit program, which incentivizes the production of low-carbon fuels by offering tax credits to producers whose transportation fuels meet specific emissions criteria. To be eligible for these credits, fuels must be produced domestically starting January 1, 2025, and sold no later than December 31, 2027.

One significant change is the exclusion of imported used cooking oil