Microsoft carbon emissions rose 25 percent in 2025 as AI data centers grow

Microsoft announced a 25 percent increase in its carbon emissions for fiscal year 2025, a jump largely attributed to the rapid expansion of its data center infrastructure to support artificial intelligence (AI) initiatives. According to Vice Chair and President Brad Smith and Chief Sustainability Officer Melanie Nakagawa, in their new sustainability report, the company's decision to shift away from non-additional, unbundled renewable energy certificates in favor of investments that introduce new carbon-free electricity to grids also contributed to the reported increase, albeit with the goal of achieving greater long-term sustainability benefits.

A significant portion of this rise in emissions stemmed from "Scope 2" emissions, specifically energy purchased for operations, which escalated from 2 percent to 13 percent of total emissions year-over-year. The report, which covers the period ending last June, does not reflect more recent developments such as Microsoft's 20-year power agreement with Chevron to construct a gas-powered plant in West Texas. Despite the current increase, Microsoft reaffirms its commitment to becoming "carbon negative by 2030."

This report follows similar disclosures from Google and Amazon, who reported 18 percent and 16 percent increases in their overall emissions, respectively, also driven by supply chain activities and business expansion including data centers. The broader data center industry is currently facing public and political scrutiny over its environmental impact, particularly concerning energy consumption and land use. State lawmakers and governors are actively exploring moratoriums or stricter regulations to address these concerns, while the industry continues to defend the necessity of data centers beyond AI applications.