In early April, a series of phone calls made by mid-level employees at Microsoft sent tremors across the global carbon removal market. According to multiple sources familiar with the matter, Microsoft informed at least three carbon removal project developers to halt progress on partnership contracts under negotiation. Additional sources indicated that Microsoft also requested at least one partner to review existing contract terms and prepare for the possibility of Microsoft unilaterally terminating cooperation in the future.
Insiders revealed that the core message conveyed by the Microsoft employees was unequivocal: the industry leader, upon which the carbon removal market heavily relies, is scaling back its related operations. Another source with knowledge of Microsoft's internal response suggested that these communications were unauthorized actions by employees, as the related strategy was originally scheduled for announcement in late 2026 and had not yet reached the public disclosure stage. It remains unclear whether the employees intentionally issued a market warning or if an internal communication breakdown occurred.
Sources disclosed that Microsoft has informed at least one partner that it is conducting an internal investigation into the serious miscommunication. A Microsoft spokesperson declined to comment on the matter.
Microsoft holds a dominant position in funding carbon capture technologies, meaning its ultimate decisions will profoundly influence the direction of various carbon removal projects. A reduction in Microsoft's investment would deliver a severe blow to the entire market. Lee Bostock, a partner at carbon advisory firm Varta Carbon Assets, noted that many global carbon removal projects have developed a "rely on Microsoft or fail" operational model. He stated, "If Microsoft pauses or withdraws, the entire industry would suffer immeasurable damage."
Microsoft has been attempting to reassure stakeholders that the company does not intend to take any radical measures. "Our carbon removal program is not ending," said Melanie Nakagawa, Microsoft's Chief Sustainability Officer, in an email on April 13. Sources close to the negotiations reported that Microsoft has assured at least three carbon removal technology developers that it will strictly honor existing contracts. A senior management team at Microsoft has reportedly been involved in efforts to reassure partners.
The three project developers notified to suspend contract negotiations had undergone months of rigorous review processes, with operations spanning areas like direct air capture and enhanced rock weathering. According to insiders, no senior executives participated in the calls, and no subsequent written confirmations were provided. In some conversations, employees read from scripts but could not offer clear explanations for the decisions, only stating that they were made by higher management. During at least two calls, Microsoft employees cited financial pressures as the reason.
Microsoft's capital expenditures are increasingly concentrated on building and operating data centers for artificial intelligence. Although Microsoft has not publicly disclosed the total investment in its portfolio of carbon removal projects—the largest of its kind globally—insiders estimate the company is projected to invest between $4 billion and $10 billion over the lifespan of its existing contracts.
Microsoft initially launched its carbon removal program to fulfill its self-imposed climate goal: achieving carbon negativity by 2030. Specifically, this means removing more carbon from the atmosphere than the company emits. Microsoft has further set a long-term objective to offset all its historical cumulative emissions since its founding in 1975 through carbon removal. As Microsoft increases investment in energy-intensive data centers, achieving this goal is becoming more challenging.
In her April 13 statement, Nakagawa affirmed that Microsoft would continue to strengthen and support its existing portfolio of nature-based and technology-based carbon removal solutions. She also noted that as the company refines its approach to meeting sustainability targets, Microsoft might "adjust the pace or scale of carbon removal procurement at certain times." She described carbon removal as just "one part of the equation" for achieving the company's climate goals.
Sources revealed that more than two weeks after the calls signaled a potential pullback, several project developers remain uncertain about the final status of their partnership contracts. Emails seeking clarification sent to Microsoft have gone unanswered, and scheduled communication calls have been repeatedly postponed.
Bostock suggested that the policy uncertainty serves as a wake-up call for carbon removal firms that have long been tethered to and reliant on Microsoft's continuous investment. "The pitfalls of this single-reliance model have been fully exposed," he said. "A market dependent on a single buyer is not a mature or healthy market."
Microsoft's next round of carbon removal contract procurement is expected to officially commence in July 2026. Brennan Spellacy, CEO and founder of carbon market platform Pachi, commented, "Microsoft's contribution to the development of carbon removal technology is irreplaceable." He added that market concerns about a potential scale-back reflect the industry's heavy reliance on Microsoft's procurement rhythm, rather than a fundamental flaw in the core development logic of carbon removal technology.
The underlying development rationale for carbon removal projects remains clear. According to research from the University of Oxford, to implement the Paris Agreement and limit global warming to below 2 degrees Celsius, the world needs to remove up to 9 billion metric tons of carbon dioxide annually by 2050. Current global carbon removal capacity falls far short of this requirement.
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