Pervasive over-crediting from cookstove offset methodologies

Annelise Gill-Wiehl (), Daniel M. Kammen and Barbara K. Haya
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Annelise Gill-Wiehl: University of California
Daniel M. Kammen: University of California
Barbara K. Haya: University of California

Nature Sustainability, 2024, vol. 7, issue 2, 191-202

Abstract: Abstract Cookstove carbon offset projects can progress multiple Sustainable Development Goals (SDGs), including climate, energy, health, gender, poverty and deforestation. However, project emission reductions must be accurately or conservatively estimated to avoid undermining climate action and long-term SDG financing. Here we conduct a comprehensive, quantitative, quality assessment of offsets by comparing five cookstove methodologies with published literature and our own analysis. We find misalignment, in order of importance, with fraction of non-renewable biomass, firewood–charcoal conversion, stove adoption, stove usage, fuel consumption, stacking (using multiple stoves), rebound and emission factors. Additionality, leakage, permanence and overlapping claims require more research. We estimate that our project sample is over-credited 9.2 times. Gold Standard’s metered methodology, which directly monitors fuel use, is most aligned with our estimates (1.5 times over-credited) and has the largest potential for emission abatement and health benefit. We provide recommendations to align methodologies with current science and SDG progress.

Date: 2024
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DOI: 10.1038/s41893-023-01259-6

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