Related Experiment Video
Updated: Apr 13, 2026
07:27
Author Spotlight: On-Site Biochar Production for Woody Debris Incineration in Forestry
Published on: January 5, 2024
4.3K
Learning lessons from over-crediting to ensure additionality in forest carbon credits
Tom Swinfield1,2, Abby Williams3,4,5, David Coomes4,6
1Department of Zoology, University of Cambridge, Cambridge, UK. tws36@cam.ac.uk.
Nature Communications
|April 11, 2026
Summary
Most Reducing Emissions from Deforestation and Degradation (REDD+) projects claim far more credits than justified, overstating conservation by 10.7 times due to flawed methodologies. Independent verification is crucial for carbon market integrity.
Area of Science:
- Environmental Science
- Climate Change Mitigation
- Carbon Markets
Background:
- Voluntary carbon markets face scrutiny over the integrity of carbon credits.
- Reducing Emissions from Deforestation and Degradation (REDD+) projects aim to conserve forests but have faced accusations of over-crediting.
Purpose of the Study:
- To synthesize independent evaluations of first-generation REDD+ projects.
- To estimate the actual additional forest conservation achieved by these projects.
- To identify the causes of over-crediting in REDD+ projects.
Main Methods:
- Meta-analysis of six independent ex post evaluations.
- Analysis of 44 REDD+ projects focused on avoided deforestation.
- Comparison of claimed versus independently estimated avoided deforestation.
Main Results:
- Most REDD+ projects demonstrated some deforestation reduction.
- Projects claimed 10.7 times more avoided deforestation than independently estimated.
- Over-crediting stemmed from selection bias in control areas and flawed modeling, not data choice.
Conclusions:
- Current REDD+ initiatives, while improving, are insufficient to guarantee credit integrity.
- Ex post certification against credible counterfactuals is essential for accurate carbon accounting.
- Ensuring genuine causal reductions in deforestation requires robust, independent verification.
Related Concept Videos
01:14Fundamental Attribution Error
14.1K
According to some social psychologists, people tend to overemphasize internal factors as explanations—or attributions—for the behavior of other people. They tend to assume that the behavior of another person is a trait of that person, and to underestimate the power of the situation on the behavior of others. They tend to fail to recognize when the behavior of another is due to situational variables, and thus to the person’s state. This erroneous assumption is...
14.1K
01:14The Carbon Cycle
45.7K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
45.7K
01:28Carbon-dioxide Fixation
893
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
893
01:25Strategies for Assessing and Addressing Confounding
561
Confounding is a critical issue in epidemiological studies, often leading to misleading conclusions about associations between exposures and outcomes. It occurs when the relationship between the exposure and the outcome is mixed with the effects of other factors that influence the outcome. Given that, addressing confounding is of high importance for drawing accurate inferences in research.
Confounding can be addressed at both the design phase of a study and through analytical methods after data...
Confounding can be addressed at both the design phase of a study and through analytical methods after data...
561
01:27C4 Pathway and CAM
50.8K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
50.8K
01:12Hindsight Biases
4.5K
Hindsight bias leads you to believe that the event you just experienced was predictable, even though it really wasn’t. In other words, you knew all along that things would turn out the way they did. Can you relate this to the phrase "Hindsight is 20/20" now?
4.5K