When AI demand doubles your electricity, who pays for the new clean megawatts?
Google's 2026 Environmental Report (covering 2024 data) disclosed total GHG emissions of ~14.3 Mt CO₂e — up ~13% year-on-year and ~48% above its 2019 baseline, driven by data-centre energy demand and supply-chain growth as AI infrastructure scales. In the same report, Google noted its global 24/7 carbon-free energy (CFE) average reached 90% in 2024, up from 64% in 2020, with some grids already at 100%. Microsoft's 2026 Environmental Sustainability Report tells the same structural story from the other side of the ledger: Scope 1 and 2 held near zero through large-scale power purchasing, while Scope 3 — chips, steel, concrete and supplier energy for datacentre build-out — remains well above its 2020 baseline (the 2024 edition put that gap at roughly 30%; the 2026 edition restates the series, so open the PDF before quoting a figure). Both still hold 2030 net-zero and carbon-negative targets. R4 R2 R10
Annual matching with certificates and hourly, local, additional clean power are not the same claim. Google's 24/7 CFE framework is the hardest public standard in the industry — a 90% global average in 2024 is genuine progress, but the remaining 10% gap, which concentrates in high-demand AI regions, is where the next accountability question lives. Microsoft's answer is shaped differently: long-dated power agreements plus supplier decarbonisation requirements. Fair question to both: which megawatts would not exist without you, and who will publish the hourly shortfall by grid region?
Call-out: the most honest thing in these reports is the rising absolute number. Google's 2026 report names the tension directly — AI energy demand is outpacing clean-energy procurement gains — and Microsoft's 2026 report keeps its own embodied-carbon problem in plain view instead of netting it away. Publishing that tension while keeping the 2030 target is credibility, not failure. The gap is that no peer publishes the additionality of the megawatts they bought — or the hourly shortfall by region.