Fig. 2: Overview of studies in the systematic assessment.
From: Systematic assessment of the achieved emission reductions of carbon crediting projects

a/b Distribution of studies across project types, (c/d) across regions and (e/f) methodology types. Note: k refers to the number in thousands, and m refers to the number in millions. See Supplementary Tables 4 and 5 for a full list of studies. Note: IFM refers to improved forest management. If the same project was evaluated by multiple studies, we count each as a separate project evaluation as the time frame, methodology and other relevant factors might differ. The total project number includes studies that could not be integrated into our quantitative framework (e.g. ref. 18) but are still discussed in the relevant sections.