Evaluating the impacts of a large-scale voluntary REDD+ project in Sierra Leone


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Abstract

jats:titleAbstract</jats:title>jats:pCarbon offsets from the REDD+ (reducing emissions from deforestation and degradation) framework to protect forests are expected to see a 100-fold increase in market value by 2050. However, independent causal impact evaluations are scarce and only a few studies assess benefits to communities themselves, a core objective of REDD+. Following a pre-analysis plan, we use a before-after-control-intervention (BACI) framework to evaluate the impact of a large-scale voluntary REDD+ project in Sierra Leone—the Gola project. We use a panel of both satellite images and household surveys to provide causal evidence of the impact of the project on local deforestation rates and socioeconomic indicators over the first 5 yr of its implementation. We find that REDD+ slowed deforestation by 30% relative to control communities while not changing economic wellbeing and conservation attitudes. We find suggestive evidence that the programme increased the value of alternative income sources, by shifting labour away from forest-dependent farming activities. A cost-to-carbon calculation shows that REDD+ led to 340,000 tCOjats:sub2</jats:sub> in avoided emissions per year, with an estimated cost of US$1.12 per averted tCOjats:sub2</jats:sub>. Our study contributes to developing an evidence base for voluntary REDD+ projects and offers a robust approach to carry out BACI assessments.</jats:p>

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Keywords
40 Engineering, 41 Environmental Sciences, 15 Life on Land
Journal Title
Nature Sustainability
Conference Name
Journal ISSN
2398-9629
2398-9629
Volume Title
Publisher
Springer Science and Business Media LLC