Microsoft is contracting with Somerville, MA-based Sublime Systems to verifiably reduce construction emissions through a binding purchase of low-carbon cement manufactured with Sublime’s proprietary technology. The tech giant’s purchase will deploy up to 622,500 metric tons of Sublime Cement over a six- to nine-year period. Deliveries will come from Sublime’s first commercial factory in Holyoke, MA and its subsequent full-scale production factory.

Microsoft has secured a priority option to purchase and deploy Sublime Cement in its construction projects when geographically possible, at its datacenters, office buildings and other infrastructure. Through this novel contract, the environmental attribute certificates (EACs) of Sublime Cement can be purchased separately from the physical cement material.

“This purchase enables Microsoft to access Sublime’s low-carbon cement technology regardless of where their construction is,” said Sublime Systems CEO and co-founder Dr. Leah Ellis. “Microsoft is stepping up as the first customer for our future megaton-scale plant, enabling us to more rapidly build and scale Sublime Cement as a global, enduring solution for clean construction.”