Apr 26, 2025 | Posted by Abdul-Rahman Oladimeji
Microsoft has signed a five-year carbon removal credit agreement with biochar firm Carba, which will see Microsoft purchase 44,000 tons of carbon removal credits over the specified period.
“We’re thrilled to contribute to Microsoft’s portfolio by providing high-quality carbon removal credits that will be retired starting in 2025,” said Andrew Jones, CEO, Carba. “Our fully integrated approach - combining biomass sourcing, processing, and secure storage - enables us to scale quickly while having the potential to deliver significant community co-benefits.”
Carba will use the biochar as an alternate daily cover and bury it in local landfills, which it claims protects it from degradation and possibly provides further environmental co-benefits. Carba says the properties of the biochar have the potential to act like an activated carbon filter within the landfill, which can reduce odors, remediate pollutants, and increase gas pollutant absorption.
Reflecting on the agreement, Brian Marrs, senior director for Energy & Carbon Removal at Microsoft said: “By colocating biomass supply chain delivery, pyrolysis, and end-use & storage, Carba’s biochar burial offers the potential to become a scalable and cost-effective climate solution.
