Guyana’s 2023 ART-TREES credits over-credited by 3.9 million tonnes
Guyana’s 2023 jurisdictional REDD+ carbon credits, issued through the ART-TREES programme, were over-credited by 3,900,000 tonnes of CO2, representing a 40% error. Climate Focus identified the discrepancy in January 2026, but the ART Secretariat only acknowledged and began correcting the error after BeZero Carbon publicly assigned the vintage a 'D' rating in October 2026. The error stemmed from an incorrect calculation of emission reductions against the crediting level, despite the validation and verification body Aenor Confía having approved the issuance in December 2025. This incident raises concerns about the integrity of the ART-TREES programme's oversight and verification processes.
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