Proposed Revision to VM0041 Methodology for the Reduction of Enteric Methane Emissions from Ruminants through the Use of Feed Ingredients, v2.0

VM0041, v2.0, provides procedures to estimate enteric methane (CH4) emission reductions generated from the inhibition of methanogenesis through the introduction of a feed ingredient into ruminants’ diet. The methodology is globally applicable.

The proposed revision seeks to:

• Update the approach for the additionality assessment as follows:
  • Update the positive list based on activity penetration by geographic region
  • Include a project based method for projects located in regions not covered by the positive list
• Expand guidance on applicability conditions
• Update the project boundary, including:
  • Nitrous oxide emissions from the production and transportation of nitrate-based feed ingredients
  • Nitrous oxide and methane emissions from manure decomposition
• Align the quantification approach options for baseline and project emissions:
  • Revise default values and criteria for parameters used for calculating enteric methane emission reductions (i.e., enteric emission factor by animal group EFEnteric, average gross energy intake GEI, conversion factor Ym, average energy density ED of dry matter intake DMI).
• Adapt and clarify monitoring requirements for baseline and project emissions

• Verra is leading the development process for this methodology. The draft methodology is currently at “5. Independent Expert Review” of the VCS Methodology Development and Review Process (PDF).
• Verra hosted a public consultation from October 8, 2025 to November 7, 2025.
• Verra issued a Request for Proposal (PDF) to select independent expert reviewers between Oct 8, 2025 to October 24, 2025.
• Stakeholders interested in collaborating during methodology development or developing projects that this methodology might enable are encouraged to contact methodologies@verra.org. Please include the Methodology Development ID# M0400 in the subject line.