Microsoft confirms carbon removal purchases amid AI energy surge
The agreement with BioCirc signals a recalibration rather than a cessation of Microsoft’s carbon removal strategy, even as the company faces rising emissions from artificial intelligence infrastructure and internal debates over energy matching protocols.
Microsoft has purchased 650,000 metric tons of carbon removal credits from startup BioCirc, a transaction that confirms the technology giant’s carbon removal programme remains active despite recent industry speculation of a halt. The agreement, signed in May, involves credits generated from five BioCirc biogas projects that capture carbon dioxide for offshore storage. The purchase serves to assuage concerns within the carbon removal sector, where Microsoft’s purchasing decisions are viewed as critical to the survival of young companies in the space.
Melanie Nakagawa, Microsoft’s chief sustainability officer, stated that the company’s carbon removal programme has not ended. She noted that Microsoft may adjust the pace or volume of procurement as it continues to refine its approach toward sustainability goals. This clarification comes after reports last month suggested the tech giant was pausing new deals, causing alarm among startups that depend on such contracts. Microsoft has repeatedly denied that it had paused its purchases, framing the current activity as a recalibration rather than a cessation.
The BioCirc deal involves biogas plants that process biomass waste, often from agriculture, using industrial bioreactors to produce methane and carbon dioxide. BioCirc captures the carbon dioxide and stores it in an underground reservoir offshore, while the methane is burned in a power plant. While the volume of this specific purchase is not considered massive in the broader context of carbon removal deals, its timing and source are significant for market confidence.
Microsoft’s sustainability efforts are under pressure due to the company’s expansion into artificial intelligence. To power its data centres in Texas, Microsoft is working with Chevron and Engine No. 1 to build a natural gas power plant that could eventually generate 5 gigawatts of electricity. Emissions from this project are expected to significantly outweigh the carbon removal achieved through the BioCirc agreement, highlighting the growing challenge of meeting the company’s 2030 target to become carbon negative.
Internally, Microsoft employees have debated whether to abandon the goal of matching zero-emissions electricity with energy use on an hourly basis. Currently, the company matches on an annual basis, which provides greater flexibility to utilise natural gas for data centres at night but makes clean energy claims harder to verify. If Microsoft continues to pursue fossil fuel power plants, it will need to increase its carbon removal purchases to offset the additional emissions and meet its long-term climate obligations.
