The deal is valued in the single-digit millions, Running Tide said. A Microsoft spokesperson declined to comment on the price. Microsoft's most recent sustainability report showed a 21.5% increase in emissions from 2020 to 2021. The software giant attributed this to scope 3 emissions, which it said were linked to data center development and more customers using its products more often. In other words, Microsoft grew its cloud and gaming businesses, and its net emissions rose in tandem. The company aims to be carbon negative in the next seven or so years, and its plan to get there hinges on carbon removal.