GREET® Model

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

October 7, 2016
GREET 2016 Release

The Argonne National Laboratory’s Systems Assessment Group is pleased to announce the 2016 release of the suite of GREET models and associated documentation. This release includes the following expansions and updates:

I. Major Expansions and Updates:

  • Updated water consumption factors for the refining processes of petroleum fuels, thermoelectric and hydroelectric power generation, and hydrogen production processes.
  • Updated high-octane-fuel (HOF, with research octane number of 100) pathways in GREET with E10, E25, and E40 ethanol blends.
  • Developed new pathways for hydrogen production from dark fermentation of lignocellulosic biomass, high temperature steam electrolysis, and reforming of bio-derived liquids.
  • Expanded and updated wastewater sludge-derived fuels and waste-to-energy pathways.
  • Updated CCLUB to include N2O emissions associated with LUC GHG emissions for ethanol production scenarios.
  • Updated emission factors for agricultural equipment and nonroad emissions.
  • Updated DME production from fossil natural gas, natural gas-derived methanol, and renewable feedstocks.
  • Updated the fuel economy and material composition of the light duty vehicles.
  • Added bio-based ethanol-to-jet pathways from corn and cellulosic biomass, and sugar-to-jet from cellulosic biomass.
  • Updated energy intensity and emissions for freight and intercity passenger rail transportation.
  • Developed in emissions within various regional aggregations of the United States, including regionalization at the state, eGrid subregion, NERC levels.

II. Other Updates:

  • Updated methane leakage emissions for natural gas pathways.
  • Updated vented, fugitive, and flaring greenhouse gas emissions from crude oil production.
  • Updated fugitive CH4 emissions from open channel transportation of vinasse for Brazilian sugarcane ethanol pathway.
  • Updated U.S. electricity generation mix based on Energy Information Administration (EIA)’s Annual Energy Outlook (AEO) 2016.
  • Updated U.S. crude oil mix and weighted average distance using EIA’s company level imports data and AEO and Canadian Association of Petroleum Producers’ market report.
  • Updated farming energy and fertilizer intensity of corn, soybean, willow, poplar, miscanthus, and switchgrass.
  • Added LiNCA battery for battery electric vehicles into GREET2, including the NCA cathode production, Aluminum hydroxide and alumina sulfate production.

For more information on these updates, please use the following link: (1.06Mb pdf)

Oct 7, 2016
GREET 2016 Downloads (fuel and vehicle cycles):

  • To download and the latest 2016 database please use the following link

GREET Fuel Cycle (GREET 1):

  • To download GREET_1_2016 and the latest 2016 database please use the following link GREET 1 Series

GREET Vehicle Cycle (GREET 2):

  • To download GREET_2_2016 and the latest 2016 database please use the following link GREET 2 Series

Oct 25, 2013

We are pleased to announce the release of the newly developed AFLEET Tool. This tool has been designed for Clean Cities stakeholders to estimate petroleum use, greenhouse gas emissions, air pollutant emissions, and cost of ownership of light-duty and heavy-duty vehicles using simple spreadsheet inputs. For more information and to download the software, check out the AFLEET Tool

How Does GREET Work?
October 2, 2015
The GREET model

To fully evaluate energy and emission impacts of advanced vehicle technologies and new transportation fuels, the fuel cycle from wells to wheels and the vehicle cycle through material recovery and vehicle disposal need to be considered. Sponsored by the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE), Argonne has developed a full life-cycle model called GREET (Greenhouse gases, Regulated Emissions, and Energy use in Transportation). It allows researchers and analysts to evaluate various vehicle and fuel combinations on a full fuel-cycle/vehicle-cycle basis.

The first version of GREET was released in 1996. Since then, Argonne has continued to update and expand the model. The most recent GREET versions are the GREET1 2015 version for fuel-cycle analysis and GREET2 2015 version for vehicle-cycle analysis.

GREET was developed as a multidimensional spreadsheet model in Microsoft Excel. This public domain model is available free of charge for anyone to use.

For a given vehicle and fuel system, GREET separately calculates the following:

  • Consumption of total resources (energy in non-renewable and renewable sources), fossil fuels (petroleum, natural gas, and coal together), petroleum, coal, natural gas and water.
  • Emissions of CO2-equivalent greenhouse gases - primarily carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O).
  • Emissions of seven criteria pollutants: volatile organic compounds (VOCs), carbon monoxide (CO), nitrogen oxide (NOx), particulate matter with size smaller than 10 micron (PM10), particulate matter with size smaller than 2.5 micron (PM2.5), black carbon (BC), and sulfur oxides (SOx).
September 3, 2010
Fuel Pathways

GREET includes more than 100 fuel pathways including petroleum fuels, natural gas fuels, biofuels, hydrogen and electricity produced from various energy feedstock sources

September 3, 2010
Vehicle Technologies

GREET simulates the following three vehicle classes: :

  • Passenger cars
  • Light Duty Truck 1 ( gross weight < 6000 lb)
  • Light Duty Truck 2 ( gross weight < 8500 lb)

GREET includes more than 80 vehicle/fuel systems covering the following vehicle technologies:

  • Conventional spark-ignition engine vehicles
  • Spark-Ignition, Direct-Injection Engine Vehicles
  • Compression-Ignition, Direct-Injection Engine Vehicles
  • Hybrid electric vehicles
    • Spark-ignition engines
    • Compression-ignition engines
  • Plug-in hybrid electric vehicles
    • Spark-ignition engines
    • Compression-ignition engines
  • Battery-powered electric vehicles
  • Fuel-cell vehicles