AI-driven datacenter builds drive Microsoft's emissions up a quarter in one year
Microsoft’s 2026 Environmental Sustainability Report highlights a paradox: while it achieved 100 % renewable power for its global electricity use last year, its datacenter expansion has pushed greenhouse‑gas emissions up 25 % to 20 million tCO₂e in 2025 (projected 34 million tCO₂e without current cuts). The company’s goal to be carbon‑negative by 2030 remains unfulfilled, though it argues AI’s societal benefits justify the energy demand. Scope 3 emissions still dominate its footprint, with Scope 2 rising to 13 % of total due to purchased power. Water use is being curbed—WUE improved 25 % since 2022, and Microsoft claims it replenished more water than it withdrew in 2025. Circular initiatives reuse 92 % of decommissioned servers, and construction experiments include low‑carbon concrete and wood‑based facilities to reduce embodied carbon. The report frames AI infrastructure as both an environmental challenge and an opportunity for leadership.