Zefiro Methane has announced the completion of its first-ever sale of carbon offsets. This is a major milestone in its mission to reduce methane emissions from abandoned oil and gas wells.
The offsets came from the American Carbon Registry’s (ACR) orphan well method. This is the first time such credits have entered the carbon market.
A project in Custer County, Oklahoma, generated the credits when Zefiro successfully sealed a deep abandoned gas well. The remediation took out almost 5,000 feet of casing. It also cut down CO₂ equivalent emissions by 92,956 metric tonnes.
This first batch of ACR-issued carbon credits is sold to Mercuria Energy America. It is the U.S. arm of a major global energy and commodities company.
Methane is a powerful greenhouse gas, trapping heat up to 80 times more effectively than carbon dioxide over a 20-year period. Addressing leaks from orphan wells is one of the fastest ways to cut harmful emissions.
This first sale confirms Zefiro’s ability to turn environmental challenges into tradable climate assets. It also highlights the growing importance of high-quality carbon credits in meeting global emissions reduction goals.
Zefiro’s Chief Executive Officer, Catherine Flax, remarked:
“The successful issuance and delivery of Zefiro’s very first carbon credits is a landmark development not just for us as a company, but also for the voluntary carbon markets as a category in which new standards are being set. With this Methodology that allows carbon offsets to be generated directly from the remediation of orphaned oil/gas wells, there is now a clear and straightforward blueprint in which the voluntary carbon markets can be leveraged as a funding source for leaking wells to be plugged without needing to rely on taxpayer resources…”
The Scale of the Orphan Well Problem
The U.S. is home to an estimated 4 million abandoned or orphaned oil and gas wells, spread across at least 26 states. Many of these wells continue to leak methane into the atmosphere, posing both environmental and health risks. Methane contributes not only to climate change but also to poor air quality that can affect local communities.
Plugging and sealing wells is expensive and technically complex. Some wells are over a hundred years old. Often, there are missing ownership records. This means no company is legally responsible for cleanup.
The challenge is huge. Thus, the U.S. federal government set aside $4.7 billion through the Bipartisan Infrastructure Law. This money will help states tackle orphan wells. Even so, private sector involvement is needed to scale solutions.
This is where Zefiro Methane comes in. The company creates carbon offset credits from verified well closures. This helps provide extra funding to address the issue. Companies and institutions can now invest in projects that reduce their emissions while also benefiting the community.
Transitioning from the scale of the problem to how Zefiro builds trust, the next section explains the company’s focus on credibility in the carbon markets.
Building Trust and Credibility in Carbon Markets
A key part of Zefiro’s progress has been establishing credibility with recognized registries and independent auditors. In April 2024, Zefiro registered its first project. This was with the American Carbon Registry, a respected carbon offset standard with a long history. This ensured its credits met rigorous criteria for transparency, permanence, and environmental integrity.
The company has also partnered with TÜV SÜD, an international certification body, to provide validation and verification of its projects. This third-party oversight ensures that the credits represent real and measurable emissions reductions.
This credibility matters. In voluntary carbon markets, not all credits are created equal. Buyers increasingly demand proof that projects are scientifically sound and environmentally effective.
With credibility established, Zefiro has begun to scale its operations, moving from single projects to broader national initiatives.
Scaling Up Methane Solutions
Zefiro has grown rapidly in recent years to support its methane reduction efforts. The company acquired Plants & Goodwin, a well-plugging expert from Pennsylvania. This adds decades of experience and boosts its technical skills.
The company also became a publicly traded company on the Cboe Canada exchange, giving it greater visibility and access to capital.
Beyond remediation, Zefiro has entered the methane monitoring market. In 2025, it got its first contract from the EPA’s Methane Emissions Reduction Program. This program is backed by funding from the Inflation Reduction Act. This expansion allows Zefiro not only to plug wells but also to track and verify emissions reductions in real time.
Together, these moves show Zefiro’s ambition to become a leader in the methane abatement space. The sale of offsets marks the shift from early-stage development to active participation in both remediation and carbon markets.
To understand why these actions matter, it is important to look at the role of methane abatement in the fight against climate change.
Why Cutting Methane Packs a Punch
Methane plays an outsized role in global warming. Here’s why:
-
Methane contributes about 30% of today’s global warming, according to the Intergovernmental Panel on Climate Change (IPCC).
-
It has a much shorter lifespan than CO₂ in the atmosphere—around 12 years—but its heat-trapping power is far stronger.
-
Cutting methane emissions can deliver fast climate benefits compared to CO₂ reductions.
-
The International Energy Agency (IEA) estimates that reducing methane from fossil fuel operations could prevent up to 0.1°C of warming by mid-century. These reductions are considered among the lowest-cost and most effective strategies to slow climate change.
Zefiro’s work directly targets this opportunity. The company seals wells that would leak methane for years. This helps reduce emissions in a clear and effective way.
The added benefit of generating carbon credits creates financial incentives for investors and buyers to support these projects. As methane abatement gains momentum, carbon offset market trends show why Zefiro Methane’s timing is significant.
Carbon Credit Market Momentum: The New Frontier
Methane abatement offsets are appealing. They tackle a strong greenhouse gas and provide clear benefits. These include land restoration and better public health.
Analysts project that the global carbon market could reach $100 billion by 2030, with methane-related credits playing a growing role. In 2024, over 4 million tons of methane credits were retired, as shown below.
For Zefiro, this trend offers a clear growth pathway. The company positions itself as a trusted supplier of verified methane offsets. This helps meet voluntary demand from businesses and prepares for future compliance needs as governments tighten climate rules.
The Global Methane Initiative (GMI) estimates that methane emissions caused by humans will grow by 2030. With the strong demand ahead, the implications of Zefiro’s first sale go beyond one project.
What This Means for Climate and Markets
Zefiro’s first-ever carbon offset sale is more than a corporate milestone—it signals a new chapter for carbon markets. It shows that orphan well remediation can become a real business. It can be funded by both public money and private capital that wants to make a climate impact.
For communities, these projects reduce methane leaks, improve local air quality, and eliminate safety risks from abandoned wells. For carbon markets, they introduce a new category of offsets backed by rigorous standards and verification. And for investors, they offer an emerging opportunity in the fast-growing carbon economy.
As climate policies advance and the need for credible carbon removals grows, Zefiro’s early success positions it as a key player. The challenge now is scaling from one project in Oklahoma to addressing millions of orphan wells across the U.S.
The post Zefiro Methane’s First Carbon Offset Sale: Turning Orphan Wells Into Climate Assets appeared first on Carbon Credits.
The accounting differences that decide whether your nature investment shows up in inventory, in BVCM, or nowhere at all.
The question reaches a procurement team about three weeks before the next sustainability committee meeting. Someone has read about insetting. Someone else has just signed off on an offset purchase. The CSO wants to know if the two are interchangeable. The answer is no, and the GHG Protocol Land Sector and Removals Standard is the reason why.
This article walks through what each term means at audit-grade specificity, what the standards actually say about how each gets counted, and how to decide which tool fits which target. The insetting vs offsetting question is one of the most-searched in corporate climate strategy, and one of the most poorly answered. By the end of this piece, you should be able to brief a committee on the difference without notes.
The two definitions, in plain English
Offsetting means buying carbon credits generated outside your value chain and retiring them against your residual emissions. The reduction happens somewhere else, financed by you, and the credit is the receipt.
Insetting means investing in emission reductions or removals inside your own value chain, typically with suppliers, where the reduction is directly linked to the products and services you buy. The reduction happens inside the boundary of your Scope 3 inventory, and the accounting treatment is fundamentally different.
The shorthand from the University of Oxford’s Nature-based Insetting Initiative is useful: insetting is what you do with the supply chain you have; offsetting is what you do with the supply chain you do not have.
What the GHG Protocol Land Sector Standard actually says
The GHG Protocol Land Sector and Removals Standard, finalised in 2024 after a multi-year pilot, sets the rules for how land-based emission reductions and removals enter corporate inventories. The Standard distinguishes between inventory accounting (Scope 1, 2, and 3) and project or intervention accounting (a separate methodology for crediting).
For insetting, the practical implication is that supplier-level interventions, when properly measured and attributed, can reduce your Scope 3 category 1 (purchased goods and services) emissions in your inventory. The reduction is not a credit retired against the inventory; it is a lower inventory number, period.
For offsetting, the credit is retired separately. It can be reported as a contribution toward a net-zero claim under the SBTi Beyond Value Chain Mitigation framework or as part of a VCMI Carbon Integrity claim, but it does not lower the inventory number.
A practical consequence: if your Science Based Target requires a 50% absolute reduction in Scope 3 emissions by 2030, insetting moves you toward the target. Offsetting does not. This single point of difference reshapes the procurement decision.
When insetting counts toward Scope 3 (and when it does not)
Insetting counts toward Scope 3 only when several conditions are met:
- The intervention must occur with an entity in your value chain.
- The emissions reduction or removal must be measured against a defensible baseline.
- The reduction must be attributed to your share of that supplier’s output, not double-counted with other buyers.
- It must follow the inventory accounting rules in the GHG Protocol Land Sector Standard, not the project accounting rules used to generate credits.
The most common failure mode is double counting. If your supplier sells the same reduction as a credit on the voluntary market and also reports it to you as a Scope 3 reduction, the math breaks. The Standard requires you to address this risk, typically by purchasing and retiring the supplier-issued credit as part of your inventory or by contractual provisions that prevent the supplier from selling the reduction twice.
When insetting does not count toward Scope 3: when the intervention sits with a supplier you do not buy from, when the baseline is not defensible, when the attribution is unclear, or when the documentation does not survive audit. Those cases default to Beyond Value Chain Mitigation, which is still useful but operates on a different ledger.
The procurement and supplier engagement question
Insetting is harder than offsetting. That is the unfashionable truth most buyers eventually confront. Offsetting is a transaction; insetting is a relationship.
To run an insetting program, you need supplier mapping precise enough to know which farms or facilities sit at which Scope 3 boundary. You need an engagement model that gets suppliers to participate, which usually requires multi-year commitments and shared economics. You need an MRV architecture that measures the right things and produces audit-ready documentation. And you need a contractual structure that prevents double counting and protects both sides.
The trade-off you receive in return is significant. Reductions count against your inventory rather than your residual. Supplier relationships deepen, which protects sourcing continuity. Yield and quality improvements often follow regenerative interventions, which reduces your input cost over time. And the regulatory file, under CSRD, CSDDD, EUDR, and the SBTi FLAG Guidance, is materially stronger.
Choosing the right tool for the right target
A practical decision rule. If your target is a science-based Scope 3 reduction and you operate in a FLAG sector or source FLAG commodities, insetting is the structurally correct tool. If your target is a net-zero claim that includes neutralising hard-to-abate residual emissions outside your value chain, BVCM via high-integrity offsets is the structurally correct tool. Most companies with material Scope 3 exposure need both, in different proportions, sequenced over time.
The sequencing matters. Insetting takes longer to stand up but produces a permanent reduction in the inventory. Offsetting can be transacted faster but does not change the inventory and now sits under tighter claim restrictions. Treat them as complementary tools with different jobs, not as substitutes. The Accountability Framework Initiative and the IUCN Global Standard for Nature-based Solutions both provide useful guardrails for the insetting side, with biodiversity, human rights, and benefit-sharing requirements that go beyond carbon math.
If you are mapping a Scope 3 reduction roadmap and need to scope which interventions count toward your inventory versus which sit in Beyond Value Chain Mitigation, the carbon and sustainability experts at Carbon Credit Capital can help you structure a nature-based supply chain investment program that fits your FLAG exposure, your target architecture, and your audit horizon. Schedule a consultation.
Net zero is often described as a balancing act: cut what you can, account for the rest, and reach zero on the ledger. That framing is useful, but it leaves something out. It treats every tonne of carbon as interchangeable and every route to zero as equally sound, while the science tells a more specific story.
Malawi has lost a striking share of its forests over the past three decades. Woodlands that once covered well over a third of the country now cover less than a quarter, and the pressure on what remains is increasing. Behind those figures sit two practical questions: what is driving the loss, and what reverses it?
-
Climate Change1 year ago
Guest post: Why China is still building new coal – and when it might stop
-
Greenhouse Gases1 year ago
Guest post: Why China is still building new coal – and when it might stop
-
Greenhouse Gases2 years ago嘉宾来稿：满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
-
Climate Change2 years ago嘉宾来稿：满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
-
Climate Change2 years ago
Bill Discounting Climate Change in Florida’s Energy Policy Awaits DeSantis’ Approval
-
Renewable Energy10 months agoSending Progressive Philanthropist George Soros to Prison?
-
Greenhouse Gases1 year ago
嘉宾来稿：探究火山喷发如何影响气候预测
-
Carbon Footprint2 years agoUS SEC’s Climate Disclosure Rules Spur Renewed Interest in Carbon Credits