Overview

• Microsoft’s 12-year partnership with Vaulted Deep, running from 2026 to 2037, commits to sequester 4.9 million tonnes of CO₂ through deep well bioslurry injection.
• The agreement includes a $1.7 billion funding commitment, pricing removal credits at roughly $350 per tonne and ranking among the largest corporate carbon-removal deals.
• Vaulted Deep’s process pumps treated human and animal waste, food scraps and paper sludge thousands of feet underground into sealed geological formations.
• Isometric’s certification underpins the credits’ claimed permanence, while environmental groups warn of potential groundwater contamination and long-term monitoring challenges.
• The initiative furthers Microsoft’s strategy to become carbon negative by 2030 and to eliminate its historical emissions by 2050 as its AI data-center footprint grows.