U.S. Commodity Greenhouse Gas Emission Factors by NAICS Code

1,016 U.S. commodities defined by the 2017 NAICS system have greenhouse gas emission factors based on 2022 GHG data. The dataset provides three factor types per commodity: Supply Chain Emissions without Margins (SEF), Margins (MEF), and their combined total (SEF+MEF). It was produced by the U.S. Environmental Protection Agency and updated in July 2024.

Use Cases

• Calculate Scope 3 emissions for a company's purchased goods and services using the SEF+MEF factor per NAICS-6 commodity.
• Analyze the contribution of supply chain margins to total embedded emissions by comparing MEF and SEF values across commodities.
• Model carbon intensity trends by linking commodity-level kg CO2e per 2022 USD factors to economic output data.
• Allocate corporate GHG inventories using the detailed kg of unique GHG per dollar factors for specific gases like methane or nitrous oxide.

Strengths

• Covers 1,016 distinct U.S. commodities at the detailed 6-digit NAICS level.
• Provides emission factors based on authoritative 2022 greenhouse gas data.
• Includes three specific factor types (SEF, MEF, SEF+MEF) for nuanced supply chain analysis.
• Offers factors in both aggregated CO2e and disaggregated individual GHG units.

Limitations

• Excludes key sectors like electricity, government, and households, limiting coverage for some economic activities.
• Factors are denominated in 2022 U.S. dollars, requiring adjustment for inflation or currency conversion for multi-year or international analysis.
• Relies on the 2017 NAICS classification, which may not reflect the most current industry definitions.

Provenance

Source

U.S. Environmental Protection Agency

Collection Method

Calculated greenhouse gas emission factors based on GHG data for U.S. commodities.

Time Range

Emission factors are based on 2022 data.

Freshness

Last updated July 2024, using 2022 as the base year for GHG data.

Geography

United States, using the North American Industry Classification System (NAICS).