Buyer Guide: A New Framework for Evaluating High-Quality Forest Carbon Projects
- 41 minutes ago
- 10 min read
PROJECT DURABILITY: HIGH-QUALITY NATURAL CLIMATE SOLUTIONS THAT LAST
Introduction
The voluntary carbon market is entering a new era of quality. As corporate buyers face increasing scrutiny from regulators, investors, and civil society, the question is no longer simply whether a carbon credit represents measurable emissions reductions, but whether the underlying conservation system is durable enough to sustain those outcomes over time.
Forests are dynamic ecological systems, not static carbon vaults. For nature-based projects, durability is a more scientifically grounded and operationally useful framework.
In practice, durability is increasingly the overarching framework for evaluating the quality, resilience, and credibility of nature-based carbon projects.
The most durable projects are those designed to sustain conservation outcomes through resilient governance systems, stable community incentives, ecological integrity, and robust operational capacity.
This guide outlines the scientific rationale behind durability, and the project design features buyers should look for when evaluating nature-based investments.
This shift is already reshaping corporate climate strategy. The Science Based Targets initiative’s evolving guidance on carbon removals, growing integrity scrutiny across the voluntary carbon market, and emerging frameworks such as TNFD are all pushing buyers toward a more rigorous evaluation of project quality, risk, and defensibility. In this environment, durability is becoming a defining measure of high-quality forest carbon projects and credible nature-based climate investments in the voluntary carbon market.
WHY DURABILITY IS REPLACING PERMANENCE IN FOREST CARBON PROJECT EVALUATION
Permanence refers to the expectation that emissions reductions or removals will remain stored and not be reversed over a defined period of time - often measured in decades, centuries, or even millennia. A reversal occurs when net GHG reductions and/or removals for a monitoring period become negative - meaning the project emitted more greenhouse gases than it reduced or removed during that period. In the voluntary carbon market, the typical approach to managing the risk of reversals is for projects to estimate their risk, and to contribute a portion of their credits proportional to that risk to a buffer pool managed by a crediting program.1 Crediting programs (e.g., Verra, Gold Standard, Equitable Earth) vary in the time period over which they require projects to estimate their risks of reversals. Verra’s AFOLU non-permanence risk tool, e.g., asks projects to assess their risk of reversals over a 100-year timeframe.
Where do these different time periods come from, and what level of permanence is required to support market confidence and environmental integrity? This question has been the subject of much debate in the voluntary carbon market, particularly as the Science Based Targets Initiative readies version two of its corporate net-zero standard, which provides corporate buyers with guidance on setting and achieving climate targets.
On the extreme end are those who advocate for a “like for like” approach, where emissions from long-term geological stores (e.g., fossil fuels) should be counterbalanced by removals with guaranteed storage of greater than 1,000 years. This approach to permanence would limit scalable climate solutions to a small number of expensive credits, for example from direct air capture projects (IEA 2022), while reducing the overall climate impact achievable today. The real cost to this delay is concrete and immediate: finance does not reach the communities and forests that need it.
Using 1,000 years as a benchmark is also arbitrary from an atmospheric science perspective. Research shows that carbon dioxide and other greenhouse gases do not leave the atmosphere at a uniform rate but are gradually absorbed through multiple Earth system processes over decades, centuries, and millennia (IPCC 2023; Joos et al. 2013). This means that CO2 is gradually absorbed by land and ocean sinks over decades and centuries. Models estimate approximately 40% of a CO2 pulse is removed within 20 years, 60% within 100 years, with about 25% remaining in the atmosphere beyond 1,000 years. This is why decades-long carbon storage still delivers substantial climate value, particularly during the critical period for avoiding dangerous climate tipping points and reducing cumulative warming (Matthews et al. 2022; Marvin et al. 2023; Wolosin et al. 2025).
Within this scientific context, buffer pools and insurance mechanisms remain important safeguards, but they work more effectively when paired with resilient, community-protected ecosystems that reduce reversal risk before it occurs.
The question, then, is not whether forests can guarantee carbon storage for 1,000 years. The more appropriate question is whether a project has built the ecological resilience, governance systems, community incentives, and financial stability necessary to minimize reversal risk and sustain conservation outcomes over time.
DURABILITY: THE REAL MEASURE OF QUALITY FOR NATURE-BASED PROJECTS
Permanence frameworks were originally designed to solely evaluate long-term carbon storage. But for nature-based systems, durability provides a more comprehensive framework for assessing whether the project design is strong enough to sustain climate outcomes over time. Factors such as biodiversity integrity, community governance, economic resilience, and operational readiness are not separate from durability, they are the defining indicators of project quality and long-term climate credibility. While permanence focuses on the longevity of carbon storage, durability evaluates the broader ecological, governance, economic, and operational conditions that make those carbon outcomes possible.
Why this matters for buyers
For buyers, durability serves as the most comprehensive framework for evaluating high-quality forest carbon proejcts. In nature-based systems, it best reflects whether climate outcomes will remain resilient, defensible, and credible over time.
WHAT CONDITIONS CREATE DURABLE CONSERVATION OUTCOMES?
Research across conservation science, ecology, and common resource governance shows that durable conservation outcomes endure when ecological resilience and human stewardship systems reinforce one another over time.
Forests with strong biodiversity integrity are more resilient to wildfire, disease, invasive species, and climate-related stressors that increase reversal risk (Trumbore et al. 2015). Furthermore, research shows that intact old-growth forests store substantially more carbon and ecological complexity than managed replacement forests, making the protection of existing forests one of the most immediate and effective climate mitigation strategies available today (Pascual et al. 2026).
At the same time, research on common resource governance has reinforced what many Indigenous and local communities have practiced for generations: environmental stewardship is strongest when communities have secure rights, governance authority, and direct incentives to protect ecosystems (Ostrom 1990; Young 1982; Sze et al. 2022; Walker et al. 2020). This relationship is reflected in the above-average protection of many tropical forests managed by Indigenous communities (Sze et al. 2022; Walker et al. 2020).
Together, this body of evidence shows that durability is not held in carbon accounting science alone, but through conservation systems capable of sustaining both ecological integrity and community stewardship over time.
When you purchase a high-quality forest carbon credit, you are financing durable conservation outcomes.
Based on decades of conservation experience and supporting scientific research, we find that high-quality forest carbon projects consistently share five core design characteristics. Together, these criteria function as integrated indicators of project durability and conservation quality.
6 KEY CRITERIA FOR HIGH-QUALITY, DURABLE FOREST CARBON PROJECTS:
COMMUNITY CO-OWNERSHIP AND GOVERNANCE
Why it matters
Projects are more durable when communities have long-term economic and governance authority over conservation outcomes.
Supporting evidence
Research on land tenure and common resource governance reinforces that secure local governance systems improve stewardship and conservation performance (Ostrom 1990; Sze et al. 2022; Walker et al. 2020).
What buyers should look for
Evidence of continuous FPIC processes, transparent revenue governance, community-led decision-making, and stable local institutional presence.
Project design implications
Communities co-create the project from day one. Free, Prior and Informed Consent is an ongoing relationship, not a one-time consultation process. Communities define their own theory of change, govern revenue allocation, and lead land stewardship on their own terms.
HOLISTIC CONSERVATION DESIGN AND OPERATIONAL READINESS
Why it matters
Durability depends on both ecological resilience and operational capacity. Structurally healthy ecosystems are more resilient to wildfire, disease, invasive species, and climate stressors that increase reversal risk over time. At the same time, projects must have the operational systems, field presence, and community preparedness necessary to identify and respond to threats before reversals occur.
Supporting evidence
Research shows that forests with strong biodiversity integrity are better able to maintain long-term carbon storage capacity under environmental stress (Trumbore et al. 2015). Climate-related risks such as wildfire, drought, and ecosystem disturbance are also increasing globally, making active monitoring and local response capacity increasingly important components of reversal risk management.
What buyers should look for
Biodiversity and ecosystem monitoring, habitat protection strategies, active wildfire and disaster prevention systems, dedicated field teams, stable local operational presence, and evidence of community-based response capacity.
Project design implications
Healthy ecosystems become more resilient when paired with active field monitoring, wildfire prevention systems, and community-based stewardship. Buffer pools and insurance mechanisms remain important safeguards, but durable projects build resilience directly into conservation operations themselves.
EQUITABLE BASELINES THAT ENABLE STABLE REVENUE
Why it matters
Durability depends on stable and predictable conservation financing. Communities are better able to invest in continued stewardship when project revenue is transparent, credible, and reliable over time.
Supporting evidence
Carbon finance systems with more accurate and equitable baselines improve the credibility and financial stability of conservation projects by better aligning credit generation with real threat levels and avoided emissions.
What buyers should look for
Independent third-party verification, transparent baseline methodologies, use of updated threat modeling, and evidence that revenue distribution supports long-term community planning.
Project design implications
Accurate baselines that reflect threat as experienced by the communities create congruent levels of conservation revenue. When financing is stable and foreseeable, communities can invest in infrastructure, governance systems, education, and local economic development that reinforce sustained conservation outcomes.
DIRECT REVENUE THAT ADDRESSES OPPORTUNITY COSTS AND BUILDS LOCAL ECONOMIES
Why it matters
Conservation outcomes are more durable when protecting forests becomes economically competitive with deforestation and extractive land use. Projects are resilient when conservation finance is invested into community-determined development priorities – including locally prioritized outcomes aligned with UN Sustainable Development Goals such as livelihoods, health, education, infrastructure, and gender equity. These investments strengthen both local economic stability and incentives for conservation.
Supporting evidence
Research on land-use economics consistently shows that sustained conservation outcomes depend on aligning economic incentives with ecosystem protection and local livelihoods (see, e.g., Jayachandran et al. 2017). Projects that invest directly in community resilience and economic development strengthen the conditions that make conservation durable.
What buyers should look for
Evidence that revenue reaches communities directly, supports local livelihoods and social development, and meaningfully offsets the economic pressures driving deforestation.
Project design implications
Communities’ revenue share must make conservation financially viable for the people protecting the forest. Without economic alignment, conservation outcomes become significantly harder to sustain over time.
STRENGTHENED LAND RIGHTS AND INSTITUTIONAL CAPACITY
Why it matters
Projects with stronger land tenure and governance systems are better able to withstand external threats such as encroachment, illegal extraction, political shifts, and land conversion pressure.
Supporting evidence
A substantial body of research links secure land tenure with improved environmental stewardship, stronger conservation outcomes, and increased long-term investment in sustainable land management (Ostrom 1990; Young 1982; Sze et al. 2022).
What buyers should look for
Formal or customary land rights recognition, local governance institutions, conflict resolution mechanisms, and evidence of community enforcement capacity.
Project design implications
When communities have both recognized rights and the ability to defend them, conservation outcomes become more self-reinforcing over time.
Projects that score well against these criteria are not only stronger climate investments—they are more resilient to regulatory scrutiny, reputational risk, and evolving market expectations. As standards for quality continue to rise, durability is increasingly becoming the defining framework for evaluating which nature-based projects buyers can confidently stand behind over time.
DURABILITY AT THE PORTFOLIO LEVEL
Durability in your sustainability strategy is designed through a diverse portfolio across regions, ecosystems, and project types. Serious climate strategy is built on combining all available solutions across time horizons, cost profiles, and risk tolerances.2
Investing in all viable options strengthens climate strategy. The goal is diversification, rigorous risk management, and real-world impact at the scale the climate crisis demands. The science is clear that stopping deforestation, especially of old-growth primary forests, is an urgent priority to mitigate climate change (Pascual et al. 2026).
BUYER CHECKLIST: PROJECT CRITERIA FOR HIGH DURABILITY
When evaluating a nature-based project for investment, these are the questions that distinguish durable projects from fragile ones. The right answers reveal whether the economics, relationships, and governance structures are in place to sustain outcomes over time.
To learn more about Wildlife Works' approach to durable forest carbon projects, visit wildlifeworks.com or contact our sales team at wildlifeworks.com/contact. You can also explore our latest blog to see how Wildlife Works applies these durability principles across projects.
DOWNLOAD THE DURABILITY GUIDE
Download the guide and access the 8-point durability checklist for evaluating high-quality forest carbon projects.
READY TO ACT FOR NATURE?
If you feel inspired to act, you can invest in Wildlife Works’ community-led projects now.
SUBSCRIBE TO OUR NEWSLETTER
Subscribe to stay in touch and get our newsletter delivered directly to your inbox.
FOOTNOTES
1See the Integrity Council for the Voluntary Carbon Market’s report on permanence for a review of these rules and approaches, and of new tools being tested to manage risk: CIWP-Permanence-Report.pdf. See also the American Forest Foundation’s report: Permanence Paper
2For perspective on the broader market discussion around risk management and durability, see: COMMENT: Article 6.4’s quiet calendar could shape the future of carbon markets « Carbon Pulse and What does a serious carbon portfolio actually look like? - Ecosystem Marketplace
REFERENCES
IEA (2022), Direct Air Capture 2022, Paris, License: CC BY 4.0
IPCC, 2023: Annex II: Acronyms, Chemical Symbols and Scientific Units [Fischlin, A., Y. Jung, N. Leprince-Ringuet, C. Ludden, C. Péan, J. Romero (eds.)]. In: Climate Change 2023: Synthesis Report. Contribution of Working Groups I, II and III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Core Writing Team, H. Lee and J. Romero (eds.)]. IPCC, Geneva, Switzerland, pp. 131-133, doi:10.59327/IPCC/AR6-9789291691647.003.
Jayachandran, S., De Laat, J., Lambin, E. F., Stanton, C. Y., Audy, R., & Thomas, N. E. (2017). Cash for carbon: A randomized trial of payments for ecosystem services to reduce deforestation. Science, 357(6348), 267-273.
Joos, F., Roth, R., Fuglestvedt, J. S., Peters, G. P., Enting, I. G., Von Bloh, W., ... & Weaver, A. J. (2013). Carbon dioxide and climate impulse response functions for the computation of greenhouse gas metrics: a multi-model analysis. Atmospheric Chemistry and Physics, 13(5), 2793-2825.
Marvin, D. C., Sleeter, B. M., Cameron, D. R., Nelson, E., & Plantinga, A. J. (2023). Natural climate solutions provide robust carbon mitigation capacity under future climate change scenarios. Scientific Reports, 13(1), 19008.
Matthews, H. D., Zickfeld, K., Dickau, M., MacIsaac, A. J., Mathesius, S., Nzotungicimpaye, C. M., & Luers, A. (2022). Temporary nature-based carbon removal can lower peak warming in a well-below 2 C scenario. Communications Earth & Environment, 3(1), 65.
Ostrom, E. (1990). Governing the commons: The evolution of institutions for collective action. Cambridge University Press.
Pascual, D., Hugelius, G., Canadell, J. G., Harden, J., Jackson, R. B., Georgiou, K., ... & Ahlström, A. (2026). Higher carbon storage in primary than secondary boreal forests in Sweden. Science, 391(6791), 1256-1261.
Sze, J. S., Carrasco, L. R., Childs, D., & Edwards, D. P. (2022). Reduced deforestation and degradation in Indigenous Lands pan-tropically. Nature Sustainability, 5(2), 123-130.
Trumbore, S., Brando, P., & Hartmann, H. (2015). Forest health and global change. Science,
349(6250), 814-818.
Walker, W. S., Gorelik, S. R., Baccini, A., Aragon-Osejo, J. L., Josse, C., Meyer, C., ... & Schwartzman, S. (2020). The role of forest conversion, degradation, and disturbance in the carbon dynamics of Amazon indigenous territories and protected areas. Proceedings of the National Academy of Sciences, 117(6), 3015-3025.
Wolosin, M., Rockström, J., Figueres, C., Sanjayan, M., Beringer, T., Griscom, B., & Hole, D. (2025). Accelerated nature-based mitigation can re-open the window to 1.5° C.
Young, O. R. (1982). Resource regimes: Natural resources and social institutions (Vol. 7). Univ of California Press.
