Carbon removal marketplace Supercritical announced a new agreement with Boeing for the purchase of 20,000 tons of durable carbon dioxide removal (CDR), sourced from a series of suppliers pursuing biochar and enhanced rock weathering (ERW) projects in developing countries.

Biochar and enhanced rock weathering (ERW) are widely viewed as among the more scalable carbon removal approaches, supported by abundant feedstocks and potential co-benefits such as improvements to soil health and agricultural productivity.

Under the agreement, Boeing worked with Supercritical to design a high-quality, diversified portfolio, reviewing more than 200 projects globally, assessed against a 118-point scientific framework covering additionality, permanence, measurability, and operational readiness.

The selected portfolio includes six suppliers across Brazil, Bolivia, Namibia, and India, spanning biochar and enhanced rock weathering solutions. Supplier selected include Exomad Green, Ground Up, InPlanet, NetZero, Varaha, and PlanBoo

Michelle You, CEO of Supercritical said:

“Most buyers still start from a shortlist of preferred suppliers. They look at what’s available and pick projects. The companies that are ahead of the curve are starting from criteria. They trust their procurement partner’s quality bar, and that partner goes and finds, or builds, the portfolio that clears it. That’s what we did for Boeing. We screened more than 200 projects against our vetting framework, and the portfolio we built is what passed. That’s the difference between a broker selling projects and a two-sided marketplace building market infrastructure.”

The announcement follows recent agreements in which Boeing agreed to purchase 80,000 tons of CDRs from carbon removal companies Grassroots Carbon and Carbonfuture.

Boeing said that it will apply carbon removal credits to address residual Scope 3 – category 6 emissions associated with business travel, supporting the company’s broader strategy to reduce and neutralize hard-to-abate emissions across its value chain. The company has voluntarily offset its Scope 1 and Scope 2 CO₂ emissions from manufacturing and operational facilities since 2020, along with Scope 3 business travel emissions, primarily using traditional carbon offsets. In 2024, Boeing said it would adopt an “avoid first, remove second” carbon management strategy, prioritizing emissions reductions at the source while using offsets and removals for hard-to-abate emissions.

Allison Melia, Vice President of Global Enterprise Sustainability, Boeing said:

“We’re committed to supporting the responsible growth of our industry and high-integrity carbon removal is key to cutting net emissions as global air travel demand continues to rise. Our work with Supercritical supports that goal by expanding access to high-quality, diversified, science-vetted carbon removal credits.”