Microsoft's Carbon Emissions Jump 25% Amid AI Data Center Expansion

Microsoft's greenhouse gas emissions rose 25% in fiscal 2025, reaching approximately 20.3 million metric tons of CO₂ equivalent, driven primarily by the expansion of its AI and cloud data center infrastructure Source: tomshardware; WIRED. The increase marks a significant setback for the company's goal to become carbon-negative by 2030, which it set in 2020 before the current AI boom.

Drivers of the Increase

The surge is largely attributed to two factors: rapid data center construction and a change in accounting. Microsoft stopped purchasing unbundled renewable energy certificates (RECs), which had previously allowed it to claim lower emissions without adding new clean power to the grid Source: Engadget; The Verge. This decision alone contributed to a rise in Scope 2 (electricity-related) emissions from 2% to 13% of the total. Additionally, the company's electricity consumption grew by 24% as it built capacity for Azure, Copilot, and OpenAI workloads Source: tomshardware.

Sustainability Goals in Question

While Microsoft insists the 2030 target remains feasible, the report acknowledges tension between AI growth and environmental goals. “While AI infrastructure is driving demand for energy, water, land, and materials, sustainability solutions are not scaling fast enough to meet demand,” the company wrote Source: Engadget. Microsoft's chief sustainability officer, Melanie Nakagawa, stated: “We continue to really be focused around carbon negativity by 2030” Source: Engadget. However, critics note that the company's recent deals for gas-powered data centers—such as the Chevron partnership in West Texas—could add millions more tons of emissions Source: WIRED. Google and Amazon also reported emission increases of 18% and 16% respectively, highlighting a broader industry trend Source: The Guardian.