Big Tech Emissions Hit 19 Million Tonnes as AI Infrastructure Drives Fossil Fuel Buildout
Google, Microsoft and Amazon together emitted 19 million metric tonnes CO2 equivalent last year, each of the first two up 25% year-on-year, as clean-energy pledges give way to gas plant construction.
The combined carbon emissions of Google, Microsoft and Amazon reached 19 million metric tonnes of carbon dioxide equivalent in the most recent financial year, roughly equal to a third of France's annual national output, according to official company figures reported by Oilprice.com on Sunday (2026-08-16). Google and Microsoft each recorded a 25% year-on-year increase; Amazon's rose 16% on the same basis.4,3
Those figures carry a significant caveat. Oilprice.com reported on Friday (2026-08-14) that analysts have flagged extreme opacity in how hyperscalers account for their emissions, with actual totals potentially understated as enterprise cloud migration expands and AI training runs multiply. The disclosed numbers may already be floors, not ceilings.3
The current figures also sit alongside a divergent set from three months earlier. Fortune reported in May (2026-05-19) that Google's emissions had jumped nearly 50% in a prior year, Amazon's by 33%, and Microsoft's by more than 23%. Those rates covered a different fiscal cycle, and the divergence across periods — Google apparently slowing from roughly 50% to 25%, Amazon from 33% to 16% — reflects both inconsistent year-end reporting boundaries and the difficulty of tracking a sector with no standardised disclosure. The numbers tell different stories depending on which window you choose.1,4
Amazon is now making the next stage of the buildout concrete. The company is constructing a gas-fired power plant in Texas that, if completed to currently planned specifications, would be permitted to release 33 million tons of carbon dioxide per year — exceeding the combined disclosed emissions of all three companies last year — and would rank as the single-biggest source of power-related emissions in the United States, Oilprice.com reported on Friday (2026-08-14).3,4
The system-wide scenario covers a wide range. Where both the fossil fuel and renewables sectors benefit equally from AI efficiency gains, global carbon dioxide emissions could rise by between 0.47 billion and 1.8 billion tonnes per year, according to analysis cited by Oilprice.com on Sunday (2026-08-16). The lower bound alone approximates the annual output of a mid-sized European economy.4
Data centres consumed about 4.6% of total U.S. electricity in 2024, a share that U.S. government estimates suggest could nearly triple by 2028, according to figures cited by Fortune in May (2026-05-19). Natural gas supplied more than 40% of that electricity in the United States in 2024. Coal accounted for 30% of data centre power globally, the International Energy Agency calculated.1
The clean-energy pledges made six years ago are visibly fraying. Amazon committed to carbon neutrality by 2040 in 2019, a decade ahead of the Paris Agreement timeline. Google set a 2030 target to run all operations on clean electricity. By May of this year, Fortune reported, Google was describing those goals as a "moonshot." Microsoft told Fortune it still aims to become carbon-negative without specifying a timeline. The companies say they must remain flexible as they build data centres that can consume more power than entire cities.1,3
The European dimension is developing separately. NGOs calculated that Ireland's data centres had added an estimated €715 million to household electricity bills between 2015 and 2023, according to a report covered by Carbon-pulse.com on Thursday (2026-05-28). Those facilities now consume more than 22% of Ireland's electricity — the highest national share in the world — ahead of an EU-level discussion on data centre energy policy.2
Formal carbon market exposure is harder to pin down. Hyperscaler operations in the United States sit largely outside mandatory cap-and-trade regimes. In Europe, the indirect effect runs through data centre power procurement, grid mix, and eventually ICE EUA demand. The Texas plant, if permitted at the planned scale, would add materially to U.S. gas load in a way that feeds the Atlantic LNG arbitrage and bears on ICE Endex TTF front-month pricing — but that transmission has not yet appeared in any specific contract.3,4
What the disclosed totals cannot yet settle is how much they are shaped by what companies choose to include within their reporting boundaries. Oilprice.com noted on Friday (2026-08-14) that as AI models proliferate across enterprise cloud infrastructure, attributing indirect emissions to any single hyperscaler becomes progressively harder. Amazon's Texas plant, if it proceeds at the permitted scale, will stress-test every assumption embedded in those disclosures — and it will do so at a permitted emissions rate nearly double what all three companies together acknowledged last year.3