Emission Factor References: V2024

SIMAP emission factors: 2024 version

Comprehensive list of references used to calculate SIMAP emission factors, organized by reference.

Updated February 2025

Annex 2

Table A-20: C Content Coefficients by Year (MMT C/QBtu)
Table A-30: Carbon Content Coefficients and Underlying Data for Petroleum Products

Annex 3 – Part A

Table A-66: CH4 and N2O Emission Factors by Fuel Type and Sector (g/GJ)
Table A-68: Fuel Consumption by Fuel and Vehicle Type (million gallons unless otherwise specified)
Table A-69: Energy Consumption by Fuel and Vehicle Type (TBtu)
Table A-71: Vehicle Miles Traveled for Gasoline On-Road Vehicles (billion miles)
Table A-72: Vehicle Miles Traveled for Diesel On-Road Vehicles (billion miles)
Table A-74: Detailed Vehicle Miles Traveled for Alternative Fuel On-Road Vehicles (106 Miles)

Annex 3 – Part B

Table A-145: Annex I Countries’ Implied Enteric Fermentation Emission Factors for Cattle by Year (kg CH4/head/year)[1]
Table A-146: Enteric Fermentation CH4 Emissions from Cattle (kt)
Table A-148: Enteric Fermentation Emission Factors for Other Livestock (kg CH4/head/year)
Table A-149: CH4 Emissions from Enteric Fermentation (kt)
Table A-155: Livestock Population (1,000 Head)
Table A-166: Total Methane Emissions from Livestock Manure Management (kt)
Table A-168: Total (Direct and Indirect) Nitrous Oxide Emissions from Livestock Manure Management (kt)

Table A-64: Fuel Consumption by Stationary Combustion for Calculating CH4 and N2O Emissions (TBtu)
Table A-67: NOx Emissions from Stationary Combustion (kt)

Table 2 Mobile Combustion CO2
Table 3 Mobile Combustion CH4 and N2O for On-Road Gasoline Vehicles
Table 4 Mobile Combustion CH4 and N2O for On-Road Diesel and Alternative Fuel Vehicles
Table 9 Scope 3 Category 5: Waste Generated in Operations and Category 12: End-of-Life Treatment of Sold Products
Table 10 Scope 3 Category 6: Business Travel and Category 7: Employee Commuting

Exhibit 5-1: Gross GHG Emissions from MSW Combustion (MTCO2E/Short Ton of Material Combusted)

Table 1.1 U.S. Default Factors for Calculating CO2 Emissions from Combustion of Fossil Fuel and Biomass

August 2024 data
- Table A1 Approximate Heat Content of Petroleum and Biofuels (Million Btu per barrel, Except as Noted)
September 2024 data
- Table A3 Approximate Heat Content of Petroleum Consumption and Fuel Ethanol
- Table A4 Approximate Heat Content of Natural Gas
- Table A5 Approximate Heat Content of Coal and Coke Coal

Table 7.SM.6 | Greenhouse gas lifetimes, radiative efficiencies, global warming potentials (GWPs), global temperature potentials (GTPs) and cumulative global temperature potentials (CGTPs)