Boeing has agreed to purchase a 20,000 tonne portfolio of durable carbon dioxide removal credits sourced from biochar and enhanced rock weathering projects across Brazil, Bolivia, Namibia and India, structured through carbon removal marketplace Supercritical. The portfolio, announced on 1 May 2026, was selected from more than 200 projects screened against a 118 point scientific framework covering additionality, permanence, measurability and operational readiness. The deal matters because it demonstrates how major industrial buyers are moving from single supplier carbon removal contracts to diversified science vetted portfolios, and signals continued institutional commitment to addressing residual emissions in hard to abate sectors such as aviation.

 

The Structure of the Portfolio

 

The portfolio includes six carbon removal suppliers operating across four developing countries. The selected suppliers are Exomad Green, Ground Up, InPlanet, NetZero, Varaha and PlanBoo, spanning biochar and enhanced rock weathering technologies. The geographic spread across Brazil, Bolivia, Namibia and India reduces concentration risk and ensures that the portfolio captures different ecological, regulatory and operational conditions. This diversification is significant because it spreads execution risk across multiple projects and supports the long term credibility of the carbon removal claims tied to the credits.

The portfolio approach was developed in close coordination between Boeing and Supercritical, beginning from a defined set of quality criteria rather than from a shortlist of preferred suppliers. Michelle You, Chief Executive Officer of Supercritical, framed the approach as a shift from project selection toward criteria led procurement, where the buyer trusts the procurement partner to apply a rigorous quality framework and assemble the portfolio that meets that standard. This model represents an evolution in how large corporate buyers engage with the carbon removal market, with greater emphasis on systematic quality assessment and less on direct relationships with individual project developers.

 

Why Biochar and Enhanced Rock Weathering Are Strategic Categories

 

Biochar and enhanced rock weathering are widely viewed as among the more scalable carbon removal approaches available today. Both technologies are supported by abundant feedstocks, biochar through agricultural and forestry residues and enhanced rock weathering through silicate minerals such as basalt, and both can deliver co benefits including improvements to soil health and agricultural productivity. These co benefits are commercially significant because they generate value beyond the carbon removal credit itself, supporting local farming systems and creating additional revenue streams for project operators.

The selection of these two categories also reflects a maturing view of carbon removal procurement. Earlier corporate carbon removal portfolios often included a wider range of categories spanning direct air capture, mineralisation and bioenergy with carbon capture, alongside biochar and enhanced rock weathering. The more recent trend is toward larger commitments to a smaller number of high quality categories that have demonstrated commercial scalability. Boeing's focus on biochar and enhanced rock weathering aligns with this shift and indicates that the buyer views these categories as ready for institutional scale procurement.

 

Read more: PepsiCo, Givaudan, Smurfit WestRock and Statkraft Sign 10-Year Spanish Wind PPA to Cut 32,000 Tonnes of CO2 Annually

 

The Significance of the 118 Point Vetting Framework

 

Supercritical reviewed more than 200 projects to select the six suppliers included in Boeing's portfolio, applying a 118 point scientific framework that covers additionality, permanence, measurability and operational readiness. The depth of this vetting process is significant because it addresses several of the integrity concerns that have affected the broader carbon market. By applying systematic criteria across a large pool of candidate projects and selecting only those that meet the quality threshold, the framework reduces the risk that low quality projects are included in corporate carbon removal portfolios.

The willingness of buyers such as Boeing to accept that only a small fraction of available projects will pass a rigorous quality screen reflects a more mature understanding of how the carbon removal market actually operates. The supply of genuinely high integrity projects remains constrained relative to the volume of projects that claim to deliver carbon removal benefits. Procurement strategies that begin from quality criteria rather than from supplier availability are therefore better positioned to deliver verifiable climate outcomes over time.

 

Boeing's Wider Carbon Management Strategy

 

The new portfolio sits within Boeing's broader carbon management strategy, which includes existing agreements with Grassroots Carbon and Carbonfuture for an additional 80,000 tonnes of carbon removal credits. The company will apply the new credits to address residual Scope 3 category 6 emissions, which cover business travel, supporting its broader strategy to reduce and neutralise hard to abate emissions across its value chain. Boeing has voluntarily offset Scope 1 and Scope 2 carbon dioxide emissions from manufacturing and operational facilities since 2020, alongside Scope 3 business travel emissions, primarily using traditional carbon offsets.

In 2024, Boeing adopted an avoid first, remove second carbon management strategy, prioritising emissions reductions at the source while using offsets and removals for the hard to abate categories of emissions that cannot be eliminated through operational changes alone. This sequencing of avoidance before removal is consistent with the most rigorous corporate climate frameworks, including the Science Based Targets initiative, and reflects how leading corporate climate strategies are increasingly structured.

Allison Melia, Vice President of Global Enterprise Sustainability at Boeing, framed the work with Supercritical as expanding access to high quality, diversified, science vetted carbon removal credits. She emphasised the role of high integrity carbon removal in cutting net emissions as global air travel demand continues to rise. The framing positions the procurement strategy as part of the responsible growth of the aviation industry rather than as a standalone sustainability activity, which is consistent with how aviation companies are increasingly approaching the long term challenge of reconciling growth with decarbonisation.

 

Explore OneStop ESG Marketplace: Carbon offset services

 

The Strategic Position of Supercritical

 

For Supercritical, the Boeing transaction reinforces the company's positioning as a two sided marketplace building infrastructure for the carbon removal market rather than acting as a project broker. Michelle You drew a clear distinction between brokers that sell projects from existing inventories and marketplaces that apply criteria to identify and assemble portfolios that meet specific buyer requirements. This positioning is commercially significant because it places greater emphasis on the platform's quality framework and supplier development capabilities rather than on the size of any specific project pipeline.

The model is increasingly important as corporate buyers move beyond opportunistic carbon credit purchases toward structured, criteria led procurement programmes. Buyers that adopt this approach typically need a procurement partner that can navigate the global supply landscape, apply consistent quality criteria and manage the operational complexity of multi project portfolios. Marketplaces that can provide these capabilities are positioned to capture a growing share of the institutional carbon removal market over the coming years.

 

What the Deal Signals for the Carbon Removal Market

 

The wider significance of the Boeing Supercritical transaction lies in what it indicates about how major industrial buyers are evolving their approach to carbon removal procurement. The combination of category diversification across biochar and enhanced rock weathering, geographic diversification across multiple developing countries, supplier diversification across six project operators, and rigorous quality vetting against a structured scientific framework reflects a more mature procurement approach than the bilateral single supplier deals that characterised earlier waves of corporate carbon removal activity.

For other corporate buyers evaluating their own carbon removal strategies, the Boeing portfolio provides a reference example of how diversification and quality vetting can be combined into a coherent procurement structure. For carbon removal project developers, the transaction reinforces the importance of meeting rigorous quality criteria as a condition of accessing institutional scale offtake from major buyers. The performance of the portfolio over the coming years, measured by carbon removal volumes verified, durability of credits delivered and the operational reliability of the underlying projects, will provide a useful indicator of how effectively the criteria led procurement model can scale across the broader corporate carbon removal market.