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ocean carbon dioxide removal

Microsoft added another feather to its cap with this sustainability commitment. It has partnered with Ebb Carbon to remove up to 350,000 tons of CO2 over the next decade using Ebb Carbon’s Electrochemical Ocean Alkalinity Enhancement (OAE) technology. The entire deal focuses on marine carbon dioxide removal (mCDR), and is believed to be the biggest so far in this space.

Understanding Ebb Carbon’s Flagship OAE Technology

Ebb Carbon, a climate tech start-up focused on marine carbon dioxide removal (mCDR), operates on the philosophy that “the ocean is one of the largest carbon sinks on the planet.”

The company is pioneering a new method for capturing atmospheric carbon and combating ocean acidification, known as Electrochemical Ocean Alkalinity Enhancement (OAE).

Inspired by nature, Ebb Carbon’s solution mirrors how plants absorb CO2. Instead of relying on land-based methods, they target the ocean to capture and store vast amounts of carbon dioxide permanently.

The 3-Step Process

Ocean alkalization is a natural process that occurs over millions of years as rain erodes rocks and carries alkaline molecules to the sea. These molecules help balance the ocean’s chemistry and can absorb CO2 from the air. Ebb’s OAE technology extracts alkalinity directly from seawater using bipolar electrodialysis (BPED) technology.

This technique is highly efficient and occurs in a fraction of the time. The company typically follows three steps which are explained in the diagram below:

  1. Ocean deacidification
  2. Permanent CO2 storage
  3. Additional carbon removal

Ebb Carbon

Regarding the deal, Ben Tarbell, CEO of Ebb Carbon, remarked,

“Microsoft is setting a powerful example with its commitment to becoming carbon negative by 2030 and by using its purchasing power to accelerate the most promising climate solutions. This agreement underscores the potential of Ebb Carbon’s technology to contribute meaningfully to gigaton-scale carbon removal in the years ahead.”

Credible media sources revealed that under the agreement, Ebb Carbon will start with an initial delivery of 1,333 tons of CO2 removals. Microsoft will have the option to secure up to an additional 350,000 tons over the next 10 years.

Brian Marrs, Senior Director of Energy & Carbon Removal at Microsoft, also highlighted the significant role of the ocean in balancing the carbon cycle and praised Ebb’s OAE technology. He expressed his sentiment by saying,

“Ebb has developed technology to leverage the natural attributes of the ocean—its massive surface area and natural processes that already pull CO2 from the atmosphere—to durably remove and store large volumes of atmospheric carbon. We are pleased to collaborate with Ebb to accelerate the scientific foundation for ocean-based carbon dioxide removal and explore the potential of ocean-based carbon removal solutions at scale.”

Advancing Oceanic Carbon Removal through Partnerships

Significantly, Ebb Carbon runs a 100-ton-per-year ocean carbon removal system at the U.S. Department of Energy’s Pacific Northwest National Laboratory (PNNL) in Sequim, Washington. This project, in partnership with public, private, academic, and philanthropic organizations, aims to advance ocean CDR and promote safe, science-based practices.

The company is also partnering with the National Oceanic and Atmospheric Administration (NOAA) and the University of Washington. They focus on researching various carbon removal models to understand local impacts on carbon and acidification, as well as their effects on marine life such as oysters and eelgrass. Subsequently, they publish their findings to enhance transparency and public understanding.

Leveraging Isometric Protocol for Reliable CO2 Removal

Microsoft and Ebb will use Isometric’s Ocean Alkalinity Enhancement (OAE) protocol to verify carbon removal. Stacy Kauk, P.Eng., Chief Science Officer at Isometric, confirmed this.

She also stated,

“OAE is promising because of the vast surface area of the ocean. This same fact requires careful monitoring, reporting, and verification (MRV). Isometric’s protocol requires measurements and the use of internationally recognized ocean models to quantify carbon removal so buyers and suppliers can be sure one credit equals one tonne of carbon dioxide removed from the atmosphere. This is another step towards creating trust and transparency in carbon markets.”

Notably, Isometric’s OAE protocol is the world’s first protocol for this kind of carbon removal. It outlines how OAE can be carefully monitored, reported, and verified (MRV). This ensures that buyers can confidently purchase OAE carbon credits, knowing they meet high standards.

Microsoft’s Commitment to Carbon Removal Solutions

Apart from reducing direct operational emissions, investing in carbon removal is one of Microsoft’s key sustainability initiatives.

Microsoft’s latest sustainability report revealed that last year the company contracted 5,015,019 metric tons of carbon removal to be retired over the next 15 years.

Microsoft

Source: Microsoft sustainability report

For example, Microsoft recently partnered with UNDO to permanently remove 15,000 tons of CO2 from the atmosphere through enhanced rock weathering. Additionally, Direct Air Capture firm 1PointFive has also teamed up with Microsoft to remove 500,000 metric tons of carbon dioxide from the atmosphere.

In 2023, Scope 1 and 2 emissions decreased by 6.3% from the 2020 baseline. However, indirect emissions (Scope 3) increased by 30.9%, resulting in a 29.1% overall rise in emissions across all scopes since 2020.

Microsoft’s commitment to carbon reduction remains a top priority not only for itself but also for a greener planet at large. This partnership with Ebb Carbon is just another example of utilizing the vast potential of the ocean. No wonder it’s a groundbreaking step in oceanic carbon dioxide removal.

The post Microsoft Inks Groundbreaking Deal with Ebb Carbon for Ocean CO2 Removal appeared first on Carbon Credits.

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Carbon Footprint

Climate-Linked Supply Chain Risk Is Already in Your P&L

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The earnings calls that quietly reframed climate from sustainability question to operating risk.

Three earnings calls in the last 18 months tell the story without any help from a press release.

Hershey, May 2024: cocoa price exposure compresses margin, and the company attributes part of the cost shock to West African weather. Olam, July 2024: coffee climate exposure quantified in the annual report. JBS, January 2025: supply chain climate disclosures expanded materially in response to investor pressure and regulatory expectation. None of these companies issued the announcement as climate news. They issued it as financial news. The climate-linked supply chain risk did not arrive with a sustainability framing; it arrived as a P&L line.

You are probably reading this article because you suspect the same thing is happening to your business. This piece walks through what is showing up on which earnings calls, how procurement and finance leaders are quantifying the exposure, and what serious corporates are doing about it before the regulator asks.

Where climate risk has already appeared in earnings

The pattern is consistent across resource-intensive sectors. A weather event compresses supply, the price spikes, the cost flows through the income statement, and the analyst on the call asks whether the event is anomalous or structural. Increasingly, the honest answer is the second one.

Cocoa is the cleanest example. The 2023 to 2024 West African harvest fell sharply on the back of erratic rainfall and disease. Cocoa futures more than tripled. Companies with concentrated West African sourcing absorbed the cost; companies with diversified sourcing absorbed less. The exposure was not climate as ESG topic. It was climate as cost of goods.

Coffee follows the same pattern. Brazilian and Vietnamese harvests have moved on weather more sharply across the last several seasons. Roasters with long-tenor supplier relationships and origin diversification have managed the volatility; roasters with spot-market exposure have not. Wheat, sugar, palm oil, beef: the same dynamic in different commodities, a pattern the IPCC AR6 Working Group II report projects will intensify across agricultural systems through mid-century.

What this means: climate risk is no longer a footnote in the 10-K. It is a line item the CFO has to explain on the call.

The three commodity exposures that hit margin first

For most companies with material Scope 3 exposure, three exposures dominate the near-term P&L risk.

  • Concentrated single-origin sourcing in a climate-vulnerable region. If your tier-one supply for any material commodity sits in one geography, you have a concentration risk that climate amplifies. Diversification across origins is the obvious hedge, but it takes years to build and requires relationships you cannot acquire by tender.
  • Supplier financial fragility under climate stress. Smallholder farmers, who supply a large share of the global cocoa, coffee, and palm oil market, do not carry the balance sheets to absorb yield shocks. When yields collapse, they exit. When they exit, your supply base shrinks, and the surviving suppliers raise prices. The risk is structural, not cyclical.
  • Logistics and storage exposure to extreme weather. Hurricane disruptions to Gulf shipping, drought-driven Panama Canal restrictions, flooding in European inland waterways: each of these has moved input costs in the last three years, a pattern documented in Munich Re’s natural catastrophe data. The exposure shows up as a one-quarter event in the financial press but accumulates over time on the cost line.

TCFD and ISSB disclosure changes

The disclosure architecture has now caught up with the risk. The Task Force on Climate-related Financial Disclosures, whose recommendations are now embedded in the ISSB’s IFRS S2 climate standard, requires companies to disclose climate-related risks across physical and transition categories, with quantification where possible.

For physical risk specifically (the climate-linked supply chain risk you are reading about), the disclosure must address both acute exposures (extreme weather events) and chronic exposures (gradual changes in temperature, precipitation, and growing seasons). The disclosure must address the time horizon over which the risk is material, the parts of the value chain exposed, and the financial impact under different scenarios.

The CSRD imposes similar requirements under European law, with double materiality (both financial and impact materiality) embedded in the assessment. The practical effect: your auditors and your investor relations team now need a defensible answer to the climate-linked supply chain risk question, and the answer needs to be quantified.

What procurement and finance can do now

Three actions matter near-term.

Map your exposure. Most companies do not have a clear view of which tier-one and tier-two suppliers sit in which climate-vulnerable geographies. Without the map, you cannot quantify the risk, and without the quantification, you cannot disclose it credibly. The map is the foundation, and World Resources Institute climate risk research provides useful public tooling to start.

Diversify and deepen, in that order. Diversification across origins reduces concentration risk, but the deeper move is to invest in the resilience of the suppliers you already have. Regenerative practices, agroforestry, soil health interventions: these reduce yield volatility under climate stress and protect your input cost trajectory.

Embed the climate spend inside procurement, not outside it. Treating climate risk as a sustainability cost line subordinates it to the ESG budget. Treating it as a procurement and resilience investment puts it in the budget that matters, which is the cost-of-goods budget that the CFO defends quarterly.

Nature-based supply chain investments are the asset class designed for exactly this purpose. They sit inside the value chain, they reduce climate-linked supply risk, they generate verifiable Scope 3 reductions, and they produce the documentation an auditor and a regulator can both test.

If you are quantifying climate-linked supply chain risk in advance of the next earnings cycle or the next disclosure period, the carbon and sustainability experts at Carbon Credit Capital can help you map your exposure and structure a Dual-Value Model response that addresses reduction, resilience, and disclosure-readiness in a single program. Schedule a consultation.

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Carbon Footprint

Where should an SME start with a carbon action plan?

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More and more small and medium-sized businesses are hearing the same question from their larger customers: What is your carbon footprint? That question now travels down entire supply chains, and it arrives next to tender requirements, certification criteria, and rising customer expectations.

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Carbon Footprint

Insetting vs Offsetting: Which Actually Counts Toward Your Scope 3 Targets

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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.

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