EPA GHG Hub waste factors for pallets (Table 9)
EPA's 2025 GHG Emission Factors Hub, Table 9, gives dimensional lumber 0.17 MTCO2e per short ton landfilled and 0.05 combusted, with recycling and composting marked NA. These inventory factors leave out the avoided-emissions parts of WARM, such as carbon storage and displaced electricity, so they are positive where WARM's are negative.
The row
| Recycled | Landfilled | Combusted | Composted |
|---|---|---|---|
| NA | 0.17 | 0.05 | NA |
Why recycling is NA
Table 9 has no recycling factor for dimensional lumber. The 'Mixed Recyclables' row in the same table carries a recycled factor of 0.09, but it describes a different material and doesn't apply to wood. The Pallet Fate Report leaves reuse and grinding out of the inventory figure and says so, rather than borrowing a factor.
How they differ from WARM
Table 9's notes say its factors do not include avoided emissions from any disposal method, which is an adjustment to WARM's life-cycle factors, so they will not match WARM. Landfill factors exclude carbon storage and energy recovery; combustion factors exclude displaced electricity. Both include transport to the facility (EPA Hub). EPA also publishes guidance on choosing between them.
Version
The 2025 Hub was the newest listed on EPA's Hub page when we checked on October 27, 2026. Name the Hub year in your disclosure; values change between editions.
Sources
- GHG Emission Factors Hub 2025, Table 9 (Scope 3 Category 5 and Category 12) U.S. EPA Center for Corporate Climate Leadership. Accessed October 27, 2026. The 2025 Hub is the latest listed on the Hub page on the access date.
- GHG Emission Factors Hub U.S. EPA. Accessed October 27, 2026.
- Guidance on using the Hub's waste factors versus WARM U.S. EPA. Accessed October 27, 2026.