GREET® Model

The Greenhouse gases, Regulated Emissions, and Energy use in Technologies Model


GREET News
Oct 11, 2021
GREET 2021 Release

The Argonne National Laboratory’s Systems Assessment Center is pleased to announce the 2021 release of the suite of GREET Models. Please read Summary of Expansions and Updates in GREET® 2021 (948KB pdf) for more details on updates in this version.

GREET 2021 Downloads

GREET.Net Model (includes fuel and vehicle cycles):
  • To download GREET.Net and the latest 2021 database please use the following link GREET.Net

GREET Excel Model:
  • Fuel-Cycle Model: To download GREET_1_2021 please use the following link GREET 1 Series
  • Vehicle-Cycle Model: To download GREET_2_2021 please use the following link GREET 2 Series

Comments and Responses
May 25, 2022
Response to comments from Lark et al. regarding the March 2022 comments on Lark et. al. (2022)

In response to the technical comments from the Systems Assessment Center and its collaborators that we released on March 21, 2022, Lark et al. provided their responses. In what follows, we review their responses and provide another round of technical comments on Lark et al. responses and their original article to reaffirm and expand our original comments on Lark et al. study . Our original and new comments are supported by literature and observed data. Our interaction with Lark et al. via written comments so far shows that assessment of land use change of biofuels and resulted greenhouse gas emissions is a complicated undertaking, and accurate results requires sound, consistent analytic approach and reliable, representative data.

Mar 21, 2022
Comments on “Environmental Outcomes of the US Renewable Fuel Standard”

The Systems Assessment Center and its collaborators provide a detailed technical review of a recently published article “Environmental Outcomes of the US Renewable Fuel Standard” by Lark et al. (2022) . Our review explored modeling approach and data sources for land use changes, types of land conversions, and soil organic carbon changes, among other parameters, in the Lark et al. study, which resulted in significantly high greenhouse gas emissions of US domestic land use changes of corn ethanol presented in that study.


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