Governments must reconcile dissonant climate assessment approaches

Nature & Climate Perspective

**Fragmented carbon accounting frameworks jeopardize ecological integrity by mischaracterizing real carbon permanence across critical terrestrial and marine biomes. **

• Dissonant accounting methodologies between national LULUCF reporting and project-level MRV distort the valuation and additionality calculations for Blue Carbon and afforestation initiatives.
• Incompatible carbon quantification baselines risk endorsing non-permanent carbon sequestration, directly conflicting with ICVCM Core Carbon Principles on permanence and leakage mitigation.
• Variations in environmental impact metrics obscure biodiversity loss and soil degradation, weakening the resilience of managed ecosystems under shifting climate baselines.

Market & Policy Outlook

**Regulatory disharmony between sovereign registries and international voluntary standards threatens the liquidity and legal integrity of global carbon trade. **

• Misalignment between UNFCCC Article 6.2/6.4 accounting frameworks and voluntary registries creates severe double-counting risks for Internationally Transferred Mitigation Outcomes (ITMOs).
• Conflicting climate assessment standards distort credit pricing, penalizing high-integrity developers seeking ICVCM CCP labels and suppressing institutional liquidity.
• Corporate entities navigate heightened litigation and reputational exposure under SBTi Scope 3 disclosures when relying on offsets evaluated under divergent domestic assessment regimes.