The International Organisation for Standardisation (ISO) and Greenhouse Gas Protocol (GHG Protocol) have announced a partnership to harmonise their existing portfolios of greenhouse gas standards and co-develop new standards for GHG emissions accounting and reporting.

The agreement will combine ISO 1406X standards, the GHG Protocol Corporate Accounting and Reporting, scope 2 and scope 3 standards, and a joint product carbon footprint standard.

This harmonised portfolio will simplify processes for companies, increase consistency for policymakers, and reduce measurement and reporting burdens.

The partnership addresses the fragmentation of standards and policies, bringing technical rigor, policy relevance, and practical usability into one set of standards.

"ISO is proud to announce this landmark partnership with GHG Protocol, which drives forward an ambition that enables co-creation, resulting in a harmonised portfolio of standards. Both ISO and GHG Protocol have a shared vision to efficiently advance climate action and simplify the task for all stakeholders. This is a new era for the carbon accounting landscape and both organisations are thrilled to be working together," Sergio Mujica, ISO Secretary-General, said.

"We are very pleased to announce this historic agreement that leverages the respective strengths of both organisations. Harmonising corporate, product and project-level GHG accounting standards is key. With users top of mind, this partnership establishes a new mechanism for long-term collaboration, demonstrating our commitment to reducing complexity in the field of international standards and allowing the development of the core frameworks needed to enable meaningful climate action across stakeholder groups," Geraldine Matchett, Steering Committee Chair of GHG Protocol, said.