The 2026 Criteria: Designing and Delivering High-Quality Carbon Removal

Key Takeaways

• Concrete and steel contribute 13% of global CO2 emissions. These materials represent substantial scope 3 emissions for companies that are building new infrastructure, including data centers.
• Low-emission alternatives and production technologies are nascent and not yet widely deployed.
• Environmental attribute certificates (EACs) are an innovative solution that can stimulate manufacturing of sustainable commodity materials and overcome market barriers to direct physical procurement.
• Relae (formerly Carbon Direct) and Microsoft developed criteria to guide Microsoft’s high-quality EAC procurement, accelerate decarbonization, and catalyze market expansion for decarbonized materials across supply chains. 
• These criteria cover seven key areas: qualifying conditions, social harms and benefits, environmental harms and benefits, additionality and baselines, catalytic impact, verifiability, and leakage.

A Vision for Low-Carbon Concrete and Steel

Concrete and steel are essential for modern construction, but are carbon-intensive. Combined, they account for approximately 13% of global carbon dioxide (CO2) emissions. ​As the demand for data centers and infrastructure development continues to grow, so do the embodied emissions from concrete and steel. There is an urgent need to decarbonize these sectors so that construction of new facilities remains consistent with climate commitments.​

However, the markets for low-carbon concrete and steel are still in their infancy. Market barriers such as low production volumes, contracting complexity, geographic concentration of supplies, and long-distance transportation limit buyers’ ability to directly procure low-carbon building materials. As buyers and sellers overcome these barriers, the market for low-carbon building materials will mature, giving producers the confidence to invest in new manufacturing facilities and giving buyers access to decarbonized materials directly in their supply chain.

Environmental attribute certificates (EACs) represent the sustainability attributes of a material commodity, unbundled and transacted separately from the physical commodity. EACs are transacted at a price that reflects the additional cost of sustainably producing the material. While barriers to direct procurement of low-carbon materials persist, EACs can serve as a powerful tool to signal demand for low-carbon concrete and steel, catalyze market expansion, and accelerate decarbonization.

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Microsoft’s Approach to Emissions from Building Materials ​

To address embodied emissions and help achieve its ambitious 2030 carbon-negative goal, Microsoft aims to deeply reduce its scope 3 emissions, including from building materials, by more than half compared to a 2020 baseline. In 2023, scope 3 emissions made up over 96% of Microsoft’s total greenhouse gas footprint. To meet its 2030 target, Microsoft is focusing on addressing supply-chain emissions related to data center construction and the embodied carbon of the commodity materials used to build them. Microsoft is already working to decarbonize its building material supply chain using the following three tactics:

• Reduce the need for concrete and steel through innovative building design or the use of lower-carbon alternatives, such as sustainably sourced mass timber.
• Directly engage with suppliers to procure low-carbon alternatives to conventional concrete and steel.‍
• Invest in and help pilot new low-carbon production pathways.

EACs represent a fourth approach to decarbonization that can both reduce emissions and catalyze industry growth. Taken together with Microsoft’s design, procurement, and investment tactics, these actions underpin a comprehensive strategy for long-term decarbonization of the built environment.

High-Quality EACs Support Decarbonization

EACs offer a virtual, market-driven solution to decarbonize the built environment by allowing companies to support low-carbon material production when physical supply chain barriers impede direct procurement. ​EACs for concrete and steel function similarly to other market-based decarbonization mechanisms such as sustainable aviation fuel (SAF) certificates in the aviation sector and renewable energy certificates (RECs) in the energy sector.

These mechanisms work by decoupling the environmental benefits of low-carbon production from the physical materials themselves. EACs allow companies to claim the environmental benefits of physical low-carbon concrete or steel production, even if they do not directly or physically source those materials. EACs provide a verified claim that a purchaser has procured a product with lower emissions, enabling companies to meet climate targets and demonstrate their commitment to sustainability.

Due to their virtual nature, which limits physical oversight of the supply chain, EACs also exacerbate risks such as double counting, greenwashing, fraud, social harms, and environmental harms. Therefore, adhering to transparent, rigorous criteria is foundational to mitigating these risks.

New Criteria to Guide Procurement of High-Quality EACs

To support the integrity and effectiveness of EACs in these sectors, Relae and Microsoft have co-developed Criteria for High-Quality Environmental Attribute Certificates in the Concrete and Steel Sectors. These robust criteria serve as a public resource for companies seeking credible and impactful EAC procurement pathways for low-carbon concrete and steel.

The criteria address seven key areas:

1. Qualifying conditions: EACs must complement, not displace, direct procurement and represent significant emissions reductions. ​
2. Social harms and benefits: EACs must not further social harms and should promote community engagement and social benefits such as meaningful workforce development opportunities and community climate resilience.
3. Environmental harms and benefits: EACs must not perpetuate environmental harm, but instead should mitigate risks and, ideally, provide additional environmental benefits.
4. Additionality and baselines: Projects funded by EACs must drive real, meaningful emissions reductions ​in terms of financial, regulatory, and common practice additionality.
5. Catalytic impact: Prioritize transformative technologies with sector-wide decarbonization potential. ​
6. Verifiability: Set a high bar for documentation, transparency, and independent auditing. ​
7. Leakage: Address risks of emissions displacement to support net-positive outcomes. ​

These criteria provide a robust framework for companies and stakeholders to evaluate and implement commodity EACs effectively, supporting impactful change. ​They balance rigor with flexibility and acknowledge the nascent state of the markets for low-carbon concrete and steel. Sectoral decarbonization will advance over time, shifting the thresholds for what is considered significant, additional, and catalytic in EAC transactions. This science-driven framework can adapt to advancements in policy, industry practices, and technological readiness, ensuring EACs remain a relevant and impactful tool for years to come. ​

Sector-Specific Insights

In addition to providing overarching criteria and guidance on procuring EACs for the built environment, Criteria for High-Quality Environmental Attribute Certificates in the Concrete and Steel Sectors also provides insights into the unique challenges and opportunities of decarbonizing concrete and steel.

Decarbonizing Concrete

EACs can support innovative decarbonization strategies for concrete, such as producing alternatives to clinker and cement, adopting supplementary cementitious materials (SCMs), and reducing emissions from cement kilns through electrification or integrating carbon capture and storage (CCS). ​Performance-based standards and evolving building codes may also unlock new opportunities for low-carbon concrete. ​

The Global Cement and Concrete Association (GCCA) publishes a rating system, Low Carbon Concrete (or Cement) Ratings, which defines eight separate low-carbon grades (AA through G). These grades correspond to the depth of decarbonization and are based on a sliding scale related to the material’s compressive strength. When developing these criteria, Microsoft considered grades AA through D to be eligible for consideration in its EAC procurements.

Decarbonizing Steel

EACs can support transformative technologies for decarbonizing steel, like direct reduced iron (DRI) with electric arc furnaces (EAF) powered by green or blue hydrogen. This support can enable the steel sector to move beyond incremental improvements and focus on capital-intensive solutions that have the potential to reshape the industry. ​

ResponsibleSteel, an independent standards and certification organization with membership that is broadly representative of the steel industry, publishes decarbonization progress levels, with four separate grades (PL1–PL4). These grades correspond to the depth of decarbonization and are based on a sliding scale related to the fraction of recycled scrap use in the steel manufacturing process. When developing these criteria, Microsoft included levels PL2 through PL4 for consideration in its EAC procurements.

A Blueprint for EAC Market Development ​

Relae and Microsoft crafted Criteria for High-Quality Environmental Attribute Certificates in the Concrete and Steel Sectors as a public resource that can help shape the future of the commodity EAC market. ​

These criteria are designed to:

• Communicate intent: Communicate Microsoft's intent to support the decarbonization and scaling of physical commodity supply chains where they have been previously limited.‍
• Guide decision-making: Serve as a public guide for Microsoft's decision-making process, explaining the rationale behind pursuing or declining specific EAC pathways.‍
• Set high-integrity standards: Maintain high integrity for EACs at an early stage, ensuring they are used to enable future physical procurement by supporting market development.‍
• Stimulate partnership opportunities: Encourage potential partnerships and purchasing pipelines by clearly describing criteria for high-quality EACs.‍
• Publicly share detailed thinking: Build on previous work and publicly share detailed thinking, aiming to stimulate market development and guide procurement decisions.

Practical Recommendations for Implementing EACs

Whether you are a supplier, buyer, policymaker, or sustainability advocate, these new criteria offer actionable insights to help you navigate the complexities of EACs in the built environment. ​From setting significance thresholds to ensuring verifiability to avoiding double counting, the criteria provide clear guidance to maximize the impact of EAC-supported projects.

Beyond the technical aspects of EACs, these criteria aim to address their broader social and environmental implications. The criteria focus on the importance of community engagement, transparency, and equitable distribution of benefits in EAC project planning, ensuring that decarbonization efforts contribute to a more sustainable and just economy. ​The criteria are backed by extensive research, stakeholder consultations, and industry expertise.

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Frequently Asked Questions

What is an environmental attribute certificate (EAC), and how does it differ from buying low-carbon concrete or steel directly? 

An environmental attribute certificate represents the sustainability attributes of a commodity material such as concrete or steel, unbundled from the physical material and transacted separately from it. Direct procurement means a buyer purchases low-carbon concrete or steel and takes physical delivery of it for a specific project. An EAC purchase instead allows a buyer to fund and claim the environmental benefit of sustainably produced materials that are sold as typical commodities, and apply that benefit against conventional commodities in their own supply chain. EACs are priced to reflect the additional cost of producing the material sustainably, which sends a demand signal to producers. This makes EACs useful where market barriers—limited production volumes, geographic concentration of supply, or long-distance transportation—prevent buyers from sourcing low-carbon materials directly.

How do EACs for concrete and steel compare to renewable energy certificates (RECs) or sustainable aviation fuel (SAF) certificates?

Environmental attribute certificates for concrete and steel share a structure with renewable energy certificates and sustainable aviation fuel certificates: each decouples the environmental benefit of low-carbon production from the physical product, letting a buyer fund and claim that benefit without taking physical delivery. There are two key differences. First, conventional RECs represent electricity with a zero-emissions footprint, while every tonne of concrete or steel behind an EAC still carries embodied emissions — the certificate demonstrates reduction against a baseline, not a zero-emission product. Second, REC and SAF markets are established, while EACs for concrete and steel are nascent. Both differences are why rigorous criteria matter: quantifying the reduction credibly is harder, and the virtual structure carries risks of double counting, greenwashing, and fraud.

Will EACs let companies claim emissions reductions without actually reducing their built environment climate footprint?

An EAC purchase does not change the materials in a buyer's own buildings; it funds lower-emission production elsewhere in the market. Credible EAC frameworks therefore require that certificates complement rather than displace direct procurement, that they represent significant reductions against a defensible baseline, and that the funded project would not have proceeded without EAC revenue. The criteria published by Relae and Microsoft enable buyers to address these requirements directly in their procurement processes - addressing the climate and reputational risks of low-quality certificates. Used this way, EACs become an additional tool to address emissions from the built environment, supplementing design changes, direct procurement, and investment in new production pathways.

Who should use these criteria?

Criteria for High-Quality Environmental Attribute Certificates in the Concrete and Steel Sectors, co-developed by Relae and Microsoft, is a public resource intended for four audiences. Buyers pursuing scope 3 reductions can use it to evaluate whether a given certificate represents a credible, additional emissions reduction. Suppliers and project developers can use it to understand what purchasers of high-quality certificates look for before bringing a project to market. Policymakers and standards bodies can draw on it while shaping rules for an emerging market. Sustainability practitioners and advocates can use it as a reference point for assessing claims made about low-carbon concrete and steel. The criteria are designed to evolve as these sectors decarbonize, and users may adapt them to meet their own levels of capability and ambition. 

Key Takeaways

• Improved forest management (IFM) increases measurable long-term carbon storage in living trees and durable wood products.
• At the same time, it can provide strong social and ecological co-benefits.
• IFM projects like the ones developed by Weyerhaeuser and the Indigenous community of Petcacab in collaboration with Relae (formerly Carbon Direct) show how IFM practices can align climate goals with social and environmental benefits.

Forests Are Climate Solutions If We Manage Them Wisely

Forests remove carbon dioxide from the atmosphere, but they need to be thoughtfully managed to keep doing so. As buyers look to scale carbon removal, improved forest management (IFM) is gaining traction in the voluntary carbon market (VCM).

IFM focuses on enhancing how existing forests are managed to increase carbon storage over time. It’s a nature-based solution that supports climate outcomes, community livelihoods, and environmental benefits when done well.

This piece explains how IFM works, what makes a project high-quality, and how real-world IFM projects like those developed by Weyerhaeuser and Petcacab in collaboration with Relae (formerly Carbon Direct) are delivering credible results for buyers and local communities alike.

What Is Improved Forest Management?

Improved forest management is a catch-all phrase that describes management techniques that decrease emissions from forests or increase carbon removal and storage. Some management techniques, like transitioning a working forest to a conserved status, decrease emissions from forest harvest and primarily create credits for avoided emissions. Other management techniques, like harvesting forests less frequently, can lead to greater carbon removal and storage over time and create credits for additional carbon removal. 

Examples of IFM Practices Include:

• Extending harvest rotations to allow more carbon accumulation
• Reducing the impact of logging on soil and surrounding trees
• Managing fire and pest risks to enhance forest health
• Transitioning some of a forest to conservation status

These strategies help forest carbon stocks grow beyond business-as-usual baselines. In carbon markets, IFM can generate carbon removal or avoided emissions credits, depending on the project's design and carbon accounting methodology.

What Makes a High-Quality IFM Carbon Removal Credit?

Buyers today face increased scrutiny around carbon credit quality. In this context, IFM projects must go beyond basic registry standards to demonstrate climate integrity and social and environmental benefits. 

Relae developed the Criteria for High-Quality Carbon Dioxide Removal, an annual report published in collaboration with Microsoft to establish science-backed quality standards. This includes six core principles that define high-quality carbon removal, all of which apply to IFM projects: 

• Social harms, benefits, and environmental justice - The extent to which the project prevents new social harms to people and communities, reduces existing harms, and provides meaningful benefits distribution. Since IFM projects take place in communities around the world, benefits will naturally vary from project to project.  
• Environmental harms and benefits - The extent to which the project minimizes and mitigates environmental harms, as well as provides environmental benefits. Because IFM projects enhance management practices, environmental co-benefits of high-quality IFM projects are usually substantial.
• Additionality and baselines – Evidence that the project’s carbon removal would not have occurred without carbon finance. Many IFM projects fail to present compelling additionality data and narratives. High-quality projects will be able to identify the actions the project took to increase carbon storage that would not have happened without carbon finance. 
• Measurement, monitoring, reporting, and verification (MMRV) – The ability to accurately quantify carbon removal in a repeatable and verifiable way, and to develop a plan for long-term monitoring of the project. IFM projects must have robust forest inventory, growth modeling, and occasional remeasurement to verify the additional carbon storage. 
• Durability – The likelihood that removed carbon remains stored over time, with mechanisms in place to mitigate reversal risk. Enhanced management of fire, pests, and disease in IFM projects can enhance forest carbon durability. 
• Leakage – Evaluation of whether project activities cause increased emissions elsewhere. If an IFM project substantially reduces timber supply, market demand can drive increased harvesting in other forests, undermining some of the project’s climate benefits. High-quality IFM projects minimize this risk by limiting harvest reductions, and account for any remaining leakage by issuing fewer credits.

Relae uses these criteria as part of our diligence framework when advising buyers evaluating projects and co-developing our own projects.

IFM Projects Delivering Real Impact

Weyerhaeuser: Applying Science at Scale

Weyerhaeuser, one of the largest forest owners in North America, is applying improved forest management practices across over 200,000 acres of working forests.

The IFM projects led by Weyerhaeuser are located in rural areas in the US, with low wildfire risk. These IFM projects sequester carbon by extending harvest rotations and forgoing harvest in established streamside management zones. 

Relae supported Weyerhaeuser with hands-on scientific collaboration to confirm that every IFM project met the Criteria for High-Quality Carbon Dioxide Removal. 

Why it matters to buyers:

• High-quality climate impact at large scale
• Transition of working forests from traditional management techniques to maximize climate impact
• Responsible forestry practices aligned with SFI® standards
• Rigorous carbon accounting and high-quality project baseline established using historical harvest records

The IFM projects led by Weyerhaeuser are some of the largest in the US today and a model for scaling science-backed forest carbon solutions.

Petcacab: Indigenous-Led Conservation in the Yucatán Peninsula

Located in the communal lands of Petcacab, Mexico, this IFM project is led by Indigenous Mayan ejidatarios—community members who have legal rights to manage the land.

Historically, forests in the ejido have been degraded through unsustainable harvesting and extensive damage from hurricanes. Through carbon finance, they are developing new forest management plans and sustainable forestry models, with revenue reinvested in health, education, and job creation.

“The rainforest for me represents my home, my work, my present, my future. We have a very daring challenge: to transform how we manage our forest, shifting from harvesting and selling timber to conserving it through the sale of carbon credits that support the development of our community.”
— Celso Chan Rivas, Carbon Project General Manager

What makes Petcacab stand out:

• Equitable benefit-sharing and strong Indigenous governance
• Critical habitat protection for endangered species
• Increased additional carbon storage through forest management and reduced land use conversion 
• Transparent reporting and verified outcomes

Petcacab is recognized by Relae as a high-quality community IFM project in Mexico, with clear social, environmental, and climate outcomes.

Investing in Forests That Deliver More Than Carbon

Improved forest management is more than a carbon strategy, it’s an investment in ecosystems, communities, and long-term impact. For buyers seeking high-integrity carbon removal with social and environmental co-benefits, IFM projects offer a compelling opportunity.

IFM projects like the ones developed by Weyerhaeuser and Petcacab in collaboration with Relae show what’s possible when forests are managed with science and care. They also reflect what the voluntary carbon market needs more of: quality, transparency, and impact beyond the metric ton.

Key Takeaways

• Sustainable aviation fuel (SAF) will not reach price parity with fossil jet fuel under any realistic near-term scenario. The cost premium is structural—rooted in the chemistry of feedstocks—not a temporary artifact of early-stage markets.
• Neither airlines nor corporate buyers are purchasing SAF for its energy content. Both are buying sustainability claims: airlines for regulatory compliance and scope 1 credentials, corporates for scope 3 emissions reporting and social license to operate. The fuel is incidental to both transactions.
• Corporate offtakes can play a genuine role in building the SAF industry, but only if they create capacity that would not otherwise exist. Additionality is not a technicality; it is the entire value proposition.
• High-integrity SAF procurement requires evaluating not just carbon reduction, but feedstock sourcing, leakage, and social and environmental harms. The newly released Criteria for High-Quality Low Carbon Fuels from Relae (formerly Carbon Direct) provides a framework for doing this rigorously.

A Major Deal Illustrates How the SAF Market Really Works 

On June 5, 2026, Google and American Airlines announced a three-year agreement under which Google will purchase sustainable aviation fuel (SAF) certificates (SAFc) associated with 35 million gallons of SAF. American will take physical delivery of the fuel at Chicago O'Hare. Google receives the emissions attributes. The arrangement relies on book-and-claim accounting, in which the physical fuel and the environmental attribute are legally separated and transferred to different parties.

The deal is a window into how the SAF market works, and what every company in the value chain needs to understand before entering it.

The SAF Cost Premium Is Structural, Not a Market Inefficiency

There is a persistent hope in the aviation industry that SAF will eventually reach price parity with fossil jet fuel. This will not happen, at least not through any mechanism that currently exists or is credibly in development.

The economics are the product of thermodynamics. Petroleum is pre-deoxygenated; over millions of years, heat and pressure stripped oxygen from biological material, concentrating energy into the hydrocarbons we pump out of the ground today. Bio-based SAF feedstocks, e.g., vegetable oils, agricultural residues, and other biomass, are oxygen-rich (carbohydrates, not hydrocarbons). Power-to-liquid e-fuels start from captured CO₂, which is fully oxidized. 

Either way, every SAF production pathway must pay an energy debt to remove or chemically reduce that oxygen, in the form of hydrogen deoxygenation, energy inputs, and processing costs. This is not a manufacturing inefficiency that scale will solve. It is a constraint baked into the feedstocks themselves.

The numbers reflect this. According to the European Union Aviation Safety Agency (EASA), the average market price of SAF in 2025 was approximately €1,925 per tonne, roughly three times the €640 per tonne average for conventional jet fuel. 

The cheapest pathway, hydroprocessed esters and fatty acids (HEFA), produced from waste oils like used cooking oil or tallow, represents almost all current SAF supply and sits at the lower end of the SAF cost range. Costlier cellulosic and e-fuel pathways push it higher. EASA estimates 2025 production costs for power-to-liquid e-fuels at €7,520 per tonne, more than ten times the cost of conventional kerosene. While these costs can and will come down, none are expected to approach price parity.

The feedstock ceiling compounds this. HEFA from waste oils is the cheapest SAF pathway, but waste oil supply is finite and competes with renewable diesel, which typically offers better margins for producers. As mandates push SAF volumes beyond what HEFA can supply, the industry must move to cellulosic biomass or power-to-liquid pathways, at progressively higher cost. Scaling the SAF industry does not automatically bring prices down. In the near term, it pushes them up.

Policy Determines Who Absorbs the Cost

If price parity is not coming, the cost premium lands somewhere. Two policy philosophies have emerged to answer that question.

Europe has largely adopted the polluter-pays principle: SAF mandates place the cost burden on fuel suppliers and, by extension, on airlines and their passengers. The EU's ReFuelEU Aviation regulation and the UK's SAF mandate both carry steep penalties for non-compliance. As Relae has documented, in the UK, those penalties range from three to 13 times the cost of compliance, depending on the obligation type and year, signaling that regulators are serious about pushing aviation toward sustainable fuels.

The United States approached the problem differently, leaning on taxpayer subsidies.The Inflation Reduction Act (IRA) 45Z Clean Fuel Production Credit and its predecessor, the 40B Sustainable Aviation Fuel Credit sought to socialize much of the cost premium. The appeal of this approach was that it made SAF economics viable without raising ticket prices. Its vulnerability was political: when the IRA's incentive landscape was revised, the project pipelines that had formed around those credits evaporated quickly. US taxpayer-funded support proved politically less durable than the UK and EU’s mandated compliance obligations.

Neither model works in isolation. Mandates without bankable project finance generate demand signals but no new supply. Incentives without policy durability attract project interest but cannot get facilities to final investment decisions. The deals that have actually moved capital combine a stable policy floor, whether mandate or incentive, with long-term private commitments that provide the revenue certainty project finance requires.

The Google-American Airlines deal illustrates the incentives-plus-private-commitment structure. The deal explicitly credits the Illinois SAF tax credit as the enabling policy lever. HEFA SAF of this type is eligible to generate Renewable Fuel Standard credits (RINs), and fuel produced from 2025 onward qualifies for the IRA's 45Z Clean Fuel Production Credit. This stack provides additional floor economics. The corporate offtake completes the structure by delivering the revenue certainty that volatile policy credits alone cannot. Remove any one of those elements and the deal's economics likely do not hold.

Nobody in this Market Is Buying SAF for its Energy Content

This is the key to understanding how the SAF market works. Neither airlines nor corporate buyers purchase SAF for its energy content. Airports have kerosene. Airlines do not need SAF to keep planes in the air. Corporate buyers, like Google, have minimal operational use for aviation fuel at all. While recent global disruptions in crude oil supply have highlighted SAF in the context of energy security, the industry as it exists today does not represent a realistic hedge against conventional fuel volatility.

What all parties are buying is the sustainability attribute attached to the fuel. For airlines, the relevant claim is a scope 1 emissions reduction: the right to report lower lifecycle carbon intensity for their flight operations. For corporate buyers, the relevant claim is a scope 3 reduction, a documented abatement of the emissions associated with their employees' business travel. Book-and-claim accounting makes this architecture explicit: it legally severs the physical fuel from the environmental attribute, allowing each to be transferred to the party that values it. The fuel is the delivery mechanism for the claim. 

This distinction matters for assessing the market. Airlines operate on among the lowest margins of any major industry. They cannot absorb the cost premium voluntarily without fundamentally compromising their finances. They participate in SAF markets when required to by mandate, or when a corporate partner subsidizes the premium by purchasing certificates downstream. The cost premium does not disappear; it shifts. Understanding where it lands is the starting point for any serious procurement decision. 

Corporate climate programs have finite budgets. SAF competes with renewable electricity procurement, fleet electrification, CO₂ removal, and supply chain decarbonization for the same dollars. Buyers who want their sustainability claims to match the actual sources of their emissions (rather than offsetting aviation with unrelated activities elsewhere) have a genuine reason to prefer SAF. 

A SAF Claim Is Only as Strong as the Quality Behind it

SAF buyers and sellers trade sustainability claims. The quality of those claims is the entire value proposition, and the reputational liability travels with them. The companies with the greatest willingness to pay for SAF certificates tend to be those with the most brand exposure: high-profile technology companies, professional services firms, and financial institutions. These are also the companies most likely to face scrutiny from regulators, NGOs, and investors if a claim does not hold up. Buying a certificate does not protect a company from that scrutiny. It transfers the liability along with the attribute.

That means a rigorous buyer needs to answer at least three distinct questions before relying on a SAF claim.

1. Does this fuel actually reduce lifecycle emissions? 

SAF's climate case rests on a carbon cycle argument: the feedstock absorbs CO₂ from the atmosphere as it grows, so when that carbon is released during combustion, the net addition to the atmosphere is theoretically near zero. But that logic holds only if upstream production is clean, and it often is not. 

Indirect land use change (when demand for a feedstock crop displaces food agriculture elsewhere, triggering clearing of forests or grasslands) can generate substantial emissions elsewhere in the global land and food system, eroding or eliminating the lifecycle benefit. Even waste-based feedstocks are not automatically clean: used cooking oil and tallow have existing market uses, and diverting them without careful accounting can displace those uses, alter commodity markets, and create emissions leakage elsewhere. 

2. Is the purchase additional? 

Additionality asks whether the procurement caused SAF to exist that otherwise would not have. This is a harder question than it appears, especially in markets where multiple policy support mechanisms are already active. For the Google-American Airlines deal, one critical variable for financial additionality—the SAFc price—has not been disclosed. If Illinois credits and federal RINs already cover most of the HEFA cost premium, then the question of what Google's purchase actually caused to happen is genuinely open. However, American Airlines has stated publicly that the long-term nature of the agreement enabled them to secure a new SAF offtake with Valero Marketing and Supply Company. The supply arrangement that may not have been bankable on the basis of volatile RIN markets and changeable policy alone. That is a real additionality argument. But it requires transparency to evaluate. The undisclosed SAF credit price is a current market liability, not just in this deal, but across the voluntary SAF market broadly.

Long-term offtakes do something that policy credits cannot: they provide stable, bankable revenue certainty. RIN prices fluctuate. Tax credits change with administrations. Neither can reliably anchor a final investment decision at the project level. A multi-year, creditworthy offtake agreement can. This is the distinctive and genuinely valuable role that corporate buyers play in this market: not paying the cost premium per gallon, but reducing the financial risk premium that keeps capital on the sidelines.

3. Is the full supply chain sound? 

Carbon claims are not the only dimension of sustainability that matters to a buyer's reputation. Companies making claims about their SAF procurement are implicitly making claims about their supply chains. That means labor practices, community impacts, Indigenous rights, feedstock sourcing integrity, and market leakage from displaced uses all fall within the scope of what a rigorous buyer should evaluate. A SAF supply chain that displaces food crops, harms a proximate community, or causes deforestation through indirect land use change creates a reputational problem that no certificate can fix.

What High-Integrity SAF Procurement Looks Like

The voluntary SAF market is still early, and the transparency it requires does not yet exist consistently. Relae recently released the Criteria for High-Quality Low Carbon Fuels, a comprehensive, publicly available framework designed to help close that gap. 

The criteria address six principles across the full supply chain: carbon accounting, additionality, feedstock sourcing, leakage, environmental harms, and social harms and environmental justice. They are designed as a practical reference for what a credible SAF claim requires, and where existing certifications may leave gaps that require additional diligence.

At the transaction level, five questions should have clear answers before any buyer signs an offtake:

1. Is the certificate linked to a specific project or supply agreement? 
2. Is that project financially dependent on the offtake, after accounting for all policy support already in the stack? 
3. Is the lifecycle emissions profile documented across the full well-to-wheel boundary, including indirect effects? 
4. Are the feedstock sourcing and supply chain risks assessed and disclosed? 
5. Has the producer evaluated leakage and community impacts?

The Google-American Airlines deal demonstrates what serious voluntary SAF procurement can look like. The Criteria for High-Quality Low Carbon Fuels provides the framework buyers need to evaluate deals like this one rigorously. 

Key Takeaways

• Decarbonizing steel is key to meeting ambitious climate targets in the face of rapidly expanding AI infrastructure as well as broader infrastructure growth.
• The gap between corporate climate ambitions and near-term commercial reality is widening. Despite strong demand signals from hyperscalers and other major buyers, leading producers have recently canceled or delayed flagship green steel projects, citing high energy costs, slow hydrogen market development, and unfavorable policy environments. 
• Bridging this gap requires significant capital investment and supporting mechanisms to scale low-carbon technologies. Environmental attribute certificates offer an effective mechanism to channel capital toward transformative, low-carbon steel projects, supporting technology scale-up, as well as providing a way for buyers to meet their emissions reduction targets.  
• To protect the credibility of environmental attribute certificates as a market mechanism for decarbonization, projects should seek to meet rigorous quality criteria such as additionality, verifiability, and catalytic impact.

Forging New Climate Ambitions for Steel Production

Decarbonizing steel production is essential to meet global climate targets. Steel production accounts for approximately 7–9% of global CO₂ emissions. This is driven chiefly by coal-based primary steelmaking, which still accounts for the majority of global production. Globally, at least 1.8 billion tonnes of crude steel were produced in 2025 to serve a broad array of industries including real estate, infrastructure, automotive, and data center construction. 

As hyperscalers race to build the infrastructure underpinning the AI revolution, steel demand for data center construction, and associated energy infrastructure, is increasing. While the relative share of data center demand for steel versus global steel demand is small, the need for approximately 20,000 tonnes of steel per data center has a material impact on hyperscaler’s public climate commitments. Microsoft, Meta, and other large technology companies have set ambitious 2030 climate targets that include their scope 3 emissions. The embodied carbon of the steel used to build their data centers sits squarely in scope 3.

Hyperscaler’s climate commitments have generated sector-specific demand for decarbonized steel, presenting an opportunity to affect steel decarbonization more broadly. Despite this demand, the supply of low-carbon steel remains limited. The industry faces significant scale-up challenges due to the diffuse nature of demand and the nascent market. Catalyzing growth in decarbonized steel production will require market innovations and new production pathways designed to overcome these challenges. Credible environmental attribute certificates can help bridge the gap between today’s market and tomorrow’s low-carbon steel sector.

What is an Environmental Attribute Certificate?

An environmental attribute certificate (EAC) represents the environmental attributes of a product that can be unbundled and transacted separately from the underlying physical commodity. The most widely used EACs today are renewable energy certificates (RECs), which track the environmental attributes of renewable electricity. The same concept can also be applied to steel and iron, as well as to materials such as cement and concrete.

In a book and claim model, a steel producer can implement a verified emissions reduction intervention, quantify the resulting lowered carbon intensity per tonne of steel produced, and convert that into tradeable certificates. Buyers can then purchase those certificates to support the deployment of low-carbon steelmaking capacity in cases where direct procurement of low-carbon steel is currently impractical due to geographic, contracting, or scheduling incompatibilities.

EACs are distinct from carbon credits. They do not represent emissions reduced or avoided relative to a counterfactual; they represent the intrinsic carbon intensity of the material produced, measured through a life cycle assessment. 

Decarbonizing Steel Requires Significant Capital and Infrastructure Deployment

Steel Production Today

Steel is currently made via three main production routes. About 71% of the world’s steel is produced through the blast furnace–basic oxygen furnace (BF-BOF) route, which emits an average of 2.33 tonnes of carbon dioxide (tCO₂) per tonne of crude steel. A further 24% is produced using scrap-based electric arc furnaces (EAFs), which emit 0.68 tCO₂ per tonne on average—far lower, but still dependent on the carbon intensity of grid electricity. The remaining roughly 5% uses direct reduced iron combined with an EAF (DRI-EAF), typically using natural gas, emitting 1.37 tCO₂ per tonne on average.

While increasing scrap-based production is a critical decarbonization lever, scrap availability is limited. Primary steel production, which uses iron ore as the main feedstock rather than recycled scrap, will remain necessary at large volumes through 2050. This makes it essential to decarbonize ore-based pathways, especially ironmaking: the step where iron ore is reduced to iron and where most emissions occur.

Decarbonizing ore-based steel production requires one of three fundamental interventions: (1) replacing coal and natural gas with low-carbon fuels such as hydrogen or bio-coke, (2) electrifying ironmaking directly, or (3) capturing and storing the CO₂ generated from fossil-fuel-based processes. All three involve significant capital expenditure and dependencies on infrastructure that is not yet in place at the necessary scale. As a result, the energy and cost challenge is substantial.

Low-Carbon Steel: Emerging Pathways

A range of transformative technological pathways are currently in development to overcome these barriers, offering the potential to deliver deep decarbonization to the steel industry exceeding 90% by 2050: 

• Hydrogen-based DRI-EAF: Using green hydrogen instead of natural gas within the DRI process provides a pathway to significantly lower the carbon intensity of ironmaking. Producers such as Stegra are deploying commercial-scale facilities designed to utilize 100% green hydrogen to reduce iron ore.
• Electrifying ironmaking: 
  
  • Molten oxide electrolysis: Boston Metal is commercializing a process that uses electricity to directly convert iron ore to molten metal through electrolysis at high temperature, eliminating the need for hydrogen or carbon reductants entirely.
  • Low-temperature electrowinning: Colorado-based startup Electra uses renewable electricity to extract iron from ore via an aqueous electrochemical process that operates at near-ambient temperature. 
• Carbon capture and storage (CCS): For blast furnaces and DRI plants with long remaining lifetimes, retrofitting with CCS technology can significantly reduce emissions. With new high-emitting capacity still being built, and assets expected to operate for decades, integrating CCS will be essential to avoid long-term carbon lock-in and to decarbonize these facilities over time. To date, commercial-scale deployment remains limited. The Al Reyadah facility at Emirates Steel is the only project currently capturing CO₂ from a DRI process at scale, though a handful of other large-scale projects have entered the development pipeline.

Progress and Setbacks: A Mixed Picture

The past year sent contradictory signals about the pace of steel decarbonization. On the demand side, technology companies with ambitious climate targets are actively signaling their intent to procure near-zero steel and support its development.

In September 2025, Microsoft and Stegra announced a landmark agreement that combines a physical supply deal for low-carbon steel with a separate EAC purchase agreement. Around the same time, Meta announced an agreement with Electra to purchase EACs tied to the startup’s clean iron production, becoming one of the first buyers to use the EAC model for an entirely novel, pre-commercial ironmaking technology. Nucor, the largest US steelmaker, also entered into a physical iron purchase agreement with Electra.

Despite these demand signals, the industry has experienced significant setbacks. A series of low-carbon steel project cancellations and delays has raised questions about the pace and viability of the steel transition, especially due to the high costs associated with green hydrogen production.

At present, the green premium for most low-carbon steel remains too high for buyers. A combination of sustained policy support, long-term demand signals from buyers willing to pay more, and scaling of supporting industries, such as green hydrogen production, is necessary for the low-carbon steel industry to be successful in the long run.

How EACs Can Bridge the Funding Gap in Steel

EACs unbundle low-carbon steel attributes from the physical material, reducing the friction between buyers who are willing to pay a green premium and geographic or logistical constraints that may inhibit physical offtake. Buyers, such as hyperscalers procuring conventional steel for data center construction in locations where low-carbon steel is not yet available, can purchase these certificates to support the development of low-carbon capacity, attribute lower-carbon production to their steel use via a market-based mechanism, and advance toward their scope 3 targets.

A primary objective of the Criteria for High-Quality Environmental Attribute Certificates in the Concrete and Steel Sectors, jointly developed by Relae (formerly Carbon Direct) and Microsoft, is to establish high-integrity standards for the EAC market in these sectors. For steel EACs, that means demonstrating significant emissions reduction performance by reaching at least Progress Level 2 in the ResponsibleSteel Decarbonization Progress Levels framework, and aiming to achieve Progress Level 3 by 2030. ResponsibleSteel’s scrap-variable benchmark provides a technology-neutral mechanism to evaluate emissions reduction performance by accounting for the specific proportion of scrap used.

EACs for steel are designed to be catalytic. Rather than supporting incremental improvements that are already becoming cost-competitive, they should target transformative capital changes, such as replacing BF-BOF routes with DRI-EAF, adopting low-carbon hydrogen in DRI processes, or deploying novel ironmaking technologies. Multi-year purchase agreements are particularly powerful because they provide the investment certainty that first-of-a-kind projects need to access capital at a lower cost.

What this Means for Buyers and Suppliers of Low-Carbon Steel 

Whether you are producing or procuring steel, EACs are only one part of a broader decarbonization strategy. For buyers with significant emissions from steel, and other building materials such as cement and concrete, EACs can be a powerful tool to help advance scope 3 reduction goals where supply for physical low-carbon materials is limited. Suppliers can complement commercialization strategies for low-carbon materials by using EACs to monetize emissions reductions, generate additional revenue to support decarbonization investments, and help scale markets for low-carbon materials. Navigating the steel market requires decisions at the intersection of technical feasibility, greenhouse gas accounting, and capital strategy. Key considerations include:

• Greenhouse gas accounting and reportability: Cradle-to-gate emissions for steel production must be tracked using life cycle assessments and should strive for interoperability with environmental product declarations (EPDs). EAC transactions must be reported transparently, especially given the absence of formal market standards at this stage.
• Additionality and catalytic impact: EAC purchases must demonstrably support projects that would not proceed without financial support from the EAC market mechanism, and projects should have a credible pathway toward the near-zero (Progress Level 4) threshold on the ResponsibleSteel framework.
• Avoiding double counting: EAC buyers must verify that the environmental attributes they purchase are not also being claimed by the physical product buyer via an EPD.

FAQs

What is an environmental attribute certificate (EAC) for steel?
An EAC represents the environmental attributes of low-carbon steel, unbundled from the physical material itself, so a producer can quantify a verified reduction in carbon intensity per tonne and sell that value as a separate, tradeable certificate. Buyers can purchase EACs to support low-carbon steel production while still working toward their own emissions targets.

How is an EAC different from a carbon credit?
An EAC reflects the intrinsic carbon intensity of the material itself, measured through a life cycle assessment. That's different from a carbon credit, which represents carbon dioxide actively avoided, reduced or removed from the atmosphere relative to a baseline.

How are AI data centers impacting the demand for low-carbon steel?

Data centers use roughly 20,000 tonnes of steel each, and as hyperscalers build out AI infrastructure, that steel use counts toward their scope 3 emissions and public climate targets. That's turned data center construction into a meaningful driver of demand for low-carbon steel, even though supply remains limited.

What makes an EAC credible enough to count toward a company's emissions goals?
A credible steel EAC needs to meet criteria like additionality (the project wouldn't happen without the EAC revenue), verifiability through life cycle assessment, and catalytic impact toward transformative technology rather than incremental gains. Relae (formerly Carbon Direct) and Microsoft jointly developed criteria for high-quality EACs in the steel and concrete sectors, which set a threshold of at least Progress Level 2 on the ResponsibleSteel Decarbonization framework today, rising to Progress Level 3 by 2030.

Can a producer sell an EAC and also get credit for the physical steel elsewhere?
No. EAC producers need to confirm the environmental attributes they're selling aren't also being claimed by whoever buys the physical steel through an environmental product declaration; otherwise the same emissions reduction gets counted twice.

Key Takeaways

• On January 30, 2026, the Greenhouse Gas Protocol (GHG Protocol) released its long-awaited Land Sector and Removals (LSR) Standard v1.0 following a 5-year consultation process. The LSR Standard is set to take effect on January 1, 2027. 
• The release of the LSR Standard represents a notable development for companies in the food and agriculture sector looking to report on land-based GHG emissions in their annual GHG inventory, as well as companies that plan to report on carbon dioxide removals (both land-based and technological).
• The accompanying Land Sector and Removals Guidance, which will provide further direction on operationalizing and implementing the LSR Standard, is expected in Q2 of 2026. However, companies with significant land-based activities may want to begin assessing the impacts of the LSR Standard on their emissions accounting procedures and decarbonization strategies today.

Why the Land Sector and Removals Standard Matters Now

Emissions from agriculture and land use change account for roughly a quarter of global emissions. Yet, for years, food, fiber, and fuel companies have lacked a clear framework for accounting and reporting on GHG emissions and carbon dioxide removals from land use. This has significantly limited their ability to demonstrate progress toward climate targets within their operations and value chain. The GHG Protocol’s Land Sector and Removals (LSR) Standard, which was released on January 30, 2026, changes that, and in doing so raises a new set of questions. 

The LSR Standard provides greater clarity on what is required of companies to transparently track and report against their emissions reduction and removal targets, and opens new pathways to report on supply chain decarbonization interventions. It also represents an important advancement for companies seeking to report on carbon dioxide removals within their emissions inventory, including both land management removals and technological removals with geologic storage.

While the LSR Standard contains notable new requirements compared to the draft released in 2022, companies still face a number of open questions related to implementation and the implications for their decarbonization strategies. 

The GHG Protocol’s accompanying Land Sector and Removals Guidance, scheduled for Q2 2026, is expected to offer more practical direction for implementing the LSR Standard. However, companies with significant land-based activities that require sufficient lead time to prepare should consider assessing the impacts today. 

Below, we provide an overview of the LSR Standard, key changes from the 2022 draft, and actionable next steps for food, fiber, and fuel companies considering the impacts on their target-setting and emissions reporting.

What Is the Land Sector and Removals Standard? 

The LSR Standard, taking effect on January 1, 2027, sets requirements and recommendations for corporate GHG accounting that cover emissions and carbon removals from agricultural and land use activities. It builds on existing GHG Protocol standards for corporate carbon accounting. Notably, the LSR Standard does not cover the forestry sector, a key break from the 2022 draft. Forest carbon accounting guidance remains under development and will be the subject of a stakeholder consultation/request for information process expected later in 2026.

Land Sector and Removals Standard vs Land Sector and Removals Guidance

The LSR Standard establishes the core requirements companies must follow, while the accompanying Land Sector and Removals Guidance, expected in Q2 of 2026, will provide more detailed implementation support. In short, the LSR Standard sets the "what" while the Land Sector and Removals Guidance will explain the "how," helping companies put those requirements into practice.

Who Should Be Using the Land Sector and Removals Standard?

The LSR Standard applies to two groups of companies:

1. Any company with significant¹ land-sector activities within its own operations or value chain (most notably the food, feed, fiber, biofuel, and advanced biomaterials sector).
2. Any company looking to report on carbon dioxide removals within their scope 1 and scope 3 inventories (including both land management removals or technological removals).

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What Changed From the 2022 Draft?

Among other provisions, the LSR Standard contains notable breaks from the 2022 draft, including specific changes related to traceability, carbon dioxide removals, leakage, and land use change.  

Traceability: A New Approach

Under the LSR Standard, companies that account for scope 3 emissions, removals, and other metrics must apply a spatial boundary. This boundary is determined by the level of traceability they can establish to known lands or regions (from least to most granular): global, jurisdictional (e.g., country), sourcing region (e.g., supply shed), land management unit (LMU) (e.g., farm), or harvested area. For more granular spatial boundaries, such as sourcing region and LMU, companies are required to establish physical traceability, which can be demonstrated through various chain of custody models.

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Alongside higher integrity chain of custody models such as identity preserved, segregated, and controlled blending, the LSR Standard opens to mass balance as a chain of custody model that can be used to demonstrate physical traceability at the sourcing region-level with appropriate safeguards. 

This is notable because mass balance is the most common chain of custody model for large volume agricultural commodities, and physical traceability is required to report removals according to the LSR standard. While challenges for reporting removals at sourcing region spatial boundaries still exist, this change unlocks new opportunities to decarbonize commodities and report removals within non-segregated supply chains through insetting programs. 

Carbon Dioxide Removals: Clarity on Spatial Boundaries

The draft LSR Standard introduces key principles for companies choosing to report land management carbon dioxide removals, including traceability, data quality, and permanence. Translating those principles into practice remains challenging given the dynamic nature of agricultural supply chains and limited farm-level traceability.

Among other requirements, the LSR Standard maintains that companies electing to report on removals must do so as a separate accounting category from emissions. They must also identify the specific lands where carbon is stored, and conduct ongoing storage monitoring to detect and report on reversals if and when they occur.

The LSR Standard does, however, resolve one of the more consequential open questions left by the 2022 draft: where companies are to draw the spatial boundary for reporting land management carbon dioxide removals. By formalizing and permitting traceability at the sourcing-region level (with appropriate safeguards), it offers a workable middle ground between farm-level precision and the broader supply chain realities that most food and agricultural companies face. 

The LSR Standard also opens to using alternative approaches to traceability, such as impact traceability, which allows companies to trace removals back to the LMU through a pathway that is separate from the physical GHG inventory. This is notable as it provides companies with optionality for recognition of farm-level supply chain investments even when physical traceability cannot be established, and inventory recognition is therefore not feasible. 

Land Use and Leakage: Stronger Requirements

Finally, the LSR Standard significantly strengthens land use and economic leakage requirements compared to the 2022 draft. While the draft gave companies flexibility to choose among land-tracking metrics, the LSR Standard mandates that all companies report land occupation for both scope 1 and scope 3 in hectares and quantify land carbon leakage whenever “high leakage risk activities”² displace food or feed production. This includes companies developing crop-based biofuels and bio-based feedstocks. 

Leakage must be quantified using the Carbon Opportunity Cost, a calculation aimed at capturing how much carbon could have been stored in the absence of land management activities.

What Should Companies Do Now?

For entities reporting in accordance with the GHG Protocol’s Corporate Standard and Scope 3 Standard, the new LSR Standard goes into effect on January 1, 2027. However, the GHG Protocol’s Land Sector and Removal Guidance is not set for publication until Q2 2026, leaving many open questions related to implementation amid a short data collection and reporting cycle 

In the interim, companies may consider a continuous improvement approach, evolving and improving their internal measurement and reporting mechanisms to enable more granular accounting over time. Companies may also consider running analyses to assess the impact of new requirements on the design and cost of decarbonization strategies, with a specific focus on data collection and monitoring approaches.

Ultimately, while implementation of the LSR Standard may evolve over time, it need not delay action on value chain intervention. Companies that continue investing in supply chain decarbonization are building the data infrastructure, supplier relationships, and operational resilience that yield greater visibility into supply chain risk and drive long-term value, independent of reporting standards. 

As the LSR Standard's requirements develop, companies that have already begun assessing their emissions footprint and strengthening supply chain traceability and data quality are likely to be better positioned to align their reporting procedures accordingly.

Key Takeaways

• Trust in carbon credits remains low. In part, this is because many mistakenly treat every credit type as interchangeable.
• Reduction, removal, and avoidance credits are verified against fundamentally different baselines, so credit quality must be judged based on type and project specifics, never with one blanket standard.
• The Integrity Council for the Voluntary Carbon Market's Core Carbon Principles now give buyers an independent bar to check against, including 44 methodologies approved across 13 eligible crediting programs, as of August 2026.
• Removal credits still make up only 5–6% of the market, even as compliance-driven demand accelerates, per our 2026 State of the Voluntary Carbon Market report.

Three Types of Carbon Credits: Reduction, Removal, and Avoidance

A carbon credit is a mechanism that allows one party to compensate another for their carbon mitigation activities. Based on their net emissions impact, there are three types of carbon credits: reduction, removal, and avoidance. 

1. Reduction credits reflect activities that decrease greenhouse gas emissions, compared to prior practices. 
2. Removal credits reflect activities that remove carbon dioxide already present in the atmosphere and oceans and lock it away for decades, centuries, or millennia.
3. Avoidance credits reflect activities that prevent greenhouse gases from being emitted in the first place. For all three types, credits are assessed and issued by measuring or estimating how much carbon is reduced, removed, or avoided as a result of a credit purchase and its associated activities.

While credits are assessed in different ways depending on the type, one of the most important indicators of quality is a project's baseline - the emissions that would be present in a business-as-usual scenario, without action being taken to reduce, remove, or avoid them. Project developers use baselines as a means of comparison to assess the net emissions impact of a project. 

• Baselines must be accurately set and data-driven. 
• Emissions impacts of a project must be correctly calculated against its baseline. 

Reduction, removal, and avoidance projects involve very different activities and, for some types of projects, it may be more challenging to establish an accurate baseline. However, without accurate baselines, climate impacts cannot be reliably determined.

Across the voluntary carbon market, Reduction credits represent roughly 20% of the purchases. Removal credits represent roughly 5% of the purchases. The remainder, roughly 75%, are avoidance credits.

Carbon Reduction Credits

Carbon reduction must drive the majority of our push to net zero, but translating carbon reduction activities into carbon credits that can be purchased is challenging. Examples of activities represented by carbon reduction credits include reducing fossil fuel use by improving fuel efficiency, or programs that reduce the methane that is generated from farms or municipal waste processing. 

Reduction credits are measured and quantified against the baseline emissions of an existing technology or process. Some reduction credits are easy to track and measure, such as efficiency investments or destruction of fugitive methane. Other projects are more complex. For example, low-emission cookstove projects in developing regions rely on tracking patterns of cookstove use and quantifying emission factors for various fuel and stove combinations, both of which are hard to do. The result, as studies have shown, sometimes leads to overcrediting in reduction projects. 

Superpollutant Credits

One class of reduction credit, superpollutant credits, has garnered recent attention. These credits involve the reduction of non-CO2 greenhouse gases with very strong radiative forcing, such as methane, nitrous oxides, or fluorinated gases like chlorofluorocarbons. These are not a substitute for CO2 removal, but can provide rapid and profound reductions at modest cost. Many different kinds of superpollutants exist in today’s market, worth roughly $60M today. Recent purchases by tech companies and others have highlighted the potential of these reduction credits.

Another class of reduction credit, transition credits, involves the deliberate early closure of emitting assets like coal-fired power plants or heavy manufacturing facilities. Early efforts by governments, banks, and companies around the world under the Just Energy Transition Partnership agreement jump-started transition credits as a concept at COP26. The Kinetic Coalition, in partnership with many groups including Relae, has launched work to bring transition credits to market with several pilot efforts, including closing a coal plant in the Philippines 10 years early. 

Carbon Removal Credits

Projects that remove carbon come from a diverse set of solutions, from nature-based solutions like reforestation, to hybrid solutions like biochar, to engineered solutions such as direct air capture and storage. Roughly 5–6% of credits on the voluntary carbon market today are classified as removals, up from roughly 3% a few years ago.

Carbon removal baselines are determined differently depending on whether a project uses an engineered, hybrid, or nature-based solution. For engineered removals, the baseline is zero, because no carbon removal was occurring in the absence of the project. The credited removal will be the difference between the quantity of carbon removed and any emissions that occur to facilitate the removal (determined through a carbon credit life cycle assessment). Baselines for hybrid and nature-based removals can be more challenging. In natural systems, changes in carbon stocks created by removals must be measured and approximated over time, and creditable removals represent the additional carbon removed by the intervention relative to the baseline (e.g., fallow land versus a reforestation project).

Another important consideration for carbon removal credits is project durability, a measure of the likely duration of carbon storage. Stored carbon can re-enter the atmosphere either through deliberate actions (e.g., deforestation) or accidental ones (e.g., wildfires). Nature-based removals are especially vulnerable to being re-released and are usually considered less durable (i.e., stored for less than 50 years). In contrast, engineered solutions offer high durability (i.e., stored for hundreds to thousands of years), and hybrid removals also offer durability periods that are typically longer than those of nature-based removals.

While less durable, nature-based solutions are effective, cost-effective, and widely available today. They made up over 95% of all carbon removal credits issued in 2025. Engineered and hybrid solutions are more expensive and scarce but offer longer durability. Prices of engineered carbon removal are likely to fall with innovation and increased market participation, but are currently much higher than most nature-based credits. With SBTi's finalized Corporate Net-Zero Standard V2.0, this balance is likely to shift. Large companies must now purchase removal credits covering 1–100% of scope 1, scope 2, and scope 3 emissions between 2035 and their net-zero year, with an explicit focus on more durable CO2 removal credits.

Carbon Avoidance Credits

Examples of carbon avoidance include avoiding deforestation that would result in the release of carbon dioxide into the atmosphere or clean energy projects that avoid the release of emissions from burning fossil fuels in possible facilities. This can be confusing, since many avoided credits are called reduction credits, as is the case with projects under the Reducing Emissions from Deforestation and Forest Degradation (REDD+) framework. Avoidance credits make up roughly 75% of certified credits on the voluntary carbon market today - an overwhelming majority - in part due to high availability and low price. 

Avoiding emissions is an important goal with numerous environmental, climate, community, and other benefits. Relae works with clients and customers across industries on developing and implementing strategies to avoid emissions within their value chain. However, there are significant challenges with the way that many carbon avoidance credits are created.

• Carbon avoidance credits are based on an estimate of the emissions that might have existed had a project not been funded. Because it is impossible to observe what might have happened in the absence of a project, carbon avoidance estimates are determined by considering historic data and contextual information. Statistical models can be used to create a presumed baseline that represents what would have happened in the absence of the project.

• Because the baseline is not observed in an avoided emissions project, there is uncertainty in calculating the number of carbon credits it produces. If the baseline is not set accurately, a project can overcredit. While the lack of a directly observed and measured baseline means avoidance credits will always have some degree of uncertainty, high-quality avoidance projects present compelling evidence to support their baselines, greatly reducing uncertainty. 

New datasets, statistical techniques, and methodologies are providing opportunities for developing avoidance credits with more certainty. Three REDD+ methodologies have now cleared the Integrity Council for the Voluntary Carbon Market (ICVCM) assessment for its Core Carbon Principles (CCPs), a concrete sign that credit quality standards for avoidance projects are maturing.

Defining and Standardizing Quality in the Voluntary Carbon Market

Carbon credits are intended to reduce, remove, or avoid emissions. They pay for an environmental service that must be delivered. Companies working to generate climate benefits through credit purchases must grapple with the differences and uncertainties of credit quality to ensure that the intended benefits are realized. 

While high-quality credits exist for all types of projects, a rich understanding of the differences in methodologies, geographies, physics, and ecology is required to identify high-quality projects and understand varied certainty, durability, and risk terms. Identifying high-quality carbon projects demands extensive and project-specific diligence beyond carbon market certification.

Our own diligence work reveals that high-quality projects can be hard to find. Fewer than 10% of the carbon removal projects we assessed for our 2026 State of the Voluntary Carbon Market report met our quality criteria. This diligence work now has an additional, independent backstop. As of August 2026, the ICVCM has approved 44 methodologies across 13 programs, as eligible for its CCP label, including ACR, Gold Standard, and VCS. For buyers, considering projects that are CCP-eligible should be used as a first filter—not a substitute for project-level diligence, but representing a legitimate floor.

While realized emissions impacts may be difficult to prove in some cases, it is important to remember that some projects provide additional co-benefits. REDD+ projects, for example, may have a positive impact on conservation and biodiversity, and cookstove projects may offer clear human health and social welfare benefits. However, these benefits should be assessed separately from carbon reduction, removal, or avoidance benefits.

Frequently Asked Questions

What's the difference between a carbon credit and a carbon offset? 

A carbon credit represents one verified tonne of emissions reduced, removed, or avoided. A  carbon offset describes how a buyer uses that credit, typically to counterbalance emissions it has not yet accounted for. The credit itself does not change type based on how it's claimed.

Which type of carbon credit—reduction, removal, or avoidance—is highest quality? 

No single type is inherently highest quality. Each project, regardless of type, is verified against a defined baseline. Quality depends on how rigorously that specific baseline was set and how well the project meets other quality criteria. Removal credits from engineered sources have the most straightforward baseline (zero), and avoidance credits carry the most baseline uncertainty by design, but these are only one determinant of credit quality.

Do carbon removal credits automatically meet the ICVCM’s Core Carbon Principles? 

No. The ICVCM assesses methodologies and programs, not individual projects. If a project uses a methodology that is eligible for the CCP label, this can be a useful floor but is not a guarantee of high quality.

How does SBTi's near-term removal mandate change which credits I should buy now?

SBTi's finalized Corporate Net-Zero Standard V2.0 doesn't require removal purchases until 2035, but it sets the ramp now (i.e., 1% of scope 1, scope 2, and scope 3 emissions in 2035, scaling to 100% by the net-zero year). This means the highest-durability removal supply that is scarcest and most in demand today is the same supply that many companies will need later. The SBTi guidelines are still changing, so buyers and project developers must track them closely.