Fragmented greenhouse gas (GHG) accounting frameworks create parallel reporting obligations, audit conflicts, and inconsistent emissions data that complicate regulatory compliance and supplier qualification globally. On July 29, 2026, the Greenhouse Gas Protocol announced it will consolidate its full suite of corporate standards with the International Organization for Standardization’s ISO 14064-1 into a single, co-branded global accounting standard, with a unified public consultation planned for Q2 2027.
Key Insights: Existing ISO/IEC 17025 or ISO 14001 accreditation may not cover the verification scope the merged standard will require, creating a compliance gap for labs currently qualifying as third-party GHG verifiers. Procurement leads need to audit verifier accreditation against the incoming two-part structure now and flag renewable energy accounting as a high-uncertainty area until the Technical Working Group (TWG) finalizes Scope 2 methodology.
The Elimination of Duplicative Carbon Emissions Reporting
The consolidation integrates the GHG Protocol’s Scope 1, Scope 2, and Scope 3 Standard and its developing Actions and Market Instruments (AMI) workstream with ISO 14064-1—replacing two parallel frameworks with one. The merged document delivers a two-part structure: Part 1 covers general requirements and the physical GHG inventory; Part 2 covers the AMI framework. Organizations that currently reconcile GHG Protocol and ISO 14064-1 requirements separately will no longer need to do so.
The consolidated standard is a named milestone in the COP30 Action Agenda, mandated by the COP30 Presidency to run through the 2028 Global Stocktake. Rooting the consolidation in a multilateral climate mandate gives the framework regulatory weight beyond voluntary adoption.
The Scope 2 public consultation drew nearly 1,100 responses from 56 countries, centering on how organizations account for renewable energy purchases. The TWG is currently evaluating multiple reporting approaches, after which the Independent Standards Board (ISB) will review and approve. QA teams supporting energy-related emissions verification should monitor the Scope 2 Guidance update process, as methodology changes may affect how purchased electricity is inventoried and disclosed.
| AMI Reporting Component | What It Covers | Compliance / Procurement Relevance |
| Physical emissions statement | Scope 1, 2, and 3 emissions from operations and value chains | Baseline inventory. Required for most mandatory disclosure frameworks |
| Market-based emissions statement | Emissions tied to commodity certificates and mitigation contractual agreements | Renewable energy certificates (RECs), power purchase agreements (PPAs), carbon credits |
| GHG impact statement | Emissions impact of actions and investments using consequential methods | Decarbonization investment verification. Science-based target alignment |
The AMI “multi-statement” approach received broad stakeholder support in the GHG Protocol’s preliminary request for information (RFI). The RFI addresses an accounting gap that has limited transparency: Organizations previously had no standardized method for reporting the climate effect of market instruments and investment decisions alongside their physical inventory.
How will the Q2 2027 Consultation Reset Carbon Emissions Reporting Requirements?
The Q2 2027 integrated public consultation is a critical planning milestone for emissions verification programs. Methodology changes finalized through that process will flow directly into how GHG inventories are structured, verified, and reported downstream, affecting supplier qualification criteria; third-party verification scope; and disclosure program alignment.
Tim Mohin, CEO, Greenhouse Gas Protocol explains, “A single corporate standard will simplify reporting, reduce duplication, and provide greater consistency across markets and jurisdictions. This will in turn allow companies to spend more time reducing emissions.” Tim adds, “The AMI standard will help organizations tell a clearer and more credible story of overall climate performance—one that reflects not only the emissions they generate, but also the actions they are taking to reduce them and their contribution to real-world decarbonization.”
Labs and procurement teams should begin transition planning in the following areas:
- Inventory scope: Confirm current GHG inventories account for all three AMI statement categories if operating under programs likely to adopt the consolidated standard
- Accreditation alignment: Assess whether existing ISO/IEC 17025 or ISO 14001 certification extends to GHG inventory verification and the AMI framework’s two-part reporting requirements
- Supplier qualification: Update supplier questionnaires to reflect both GHG Protocol and ISO 14064-1 methodology requirements until the consolidated standard is published
- Scope 2 methodology: Flag renewable energy accounting as a high-uncertainty area pending TWG and ISB resolution
Next Steps to Audit Your Accreditation
Review the consolidated standard development plan to confirm how the phased consolidation affects current reporting obligations. Explore how Scope 3 and outsourced testing intersect and what clients now expect from contract labs as disclosure requirements tighten.
Accredited environmental testing and waste management labs on the Contract Laboratory network are available to support GHG verification, emissions sampling, and inventory analysis. Submit a free lab request right away!
The original press release can be found here.
This article was created with the assistance of Generative AI and has undergone editorial review before publishing.