Meta Bets on Green Cement for Data Centers

Meta is investing in Sublime Systems, a startup developing low-carbon cement, to address the substantial environmental impact of its data center construction boom. The company will purchase Environmental Attribute Certificates, equivalent to 180,000 tons of cement, to support Sublime's U.S. plant construction. This initiative targets the cement industry's significant contribution to global CO₂ emissions, estimated at 7%.

Sublime Systems employs an electrochemical manufacturing process that heats calcium silicate rock, producing cement with 70% to 80% less CO₂ than traditional methods. This approach is seen as crucial for tackling hard-to-decarbonize infrastructure components, as noted by Meta's head of net zero strategy. The U.S., a major cement importer with aging plants, presents a key market for such innovations.

Environmental Attribute Certificates, while controversial for potentially enabling greenwashing, are defended by Sublime as financing genuine emissions reductions. Meta emphasizes these certificates complement direct emission reduction efforts. Sublime aims to scale its production, with its first plant costing $600-$700 million and targeting 1 million tons annually, seeking wider adoption beyond data centers into broader construction projects.