Google's 2025 sustainability report reveals that its electricity consumption rose 37% — to over 42 million MWh — the largest annual increase in the company's history, driven by the ongoing AI infrastructure buildout. Google reports that operational emissions fell 2%, but supply chain emissions jumped 25%, pushing the company's total carbon footprint up 18% year-on-year.
Key takeaways
- Google's electricity use rose 37% in 2025, reaching over 42 million MWh — the largest single-year increase in the company's history
- Cumulative growth since 2019: over 250%
- Operational emissions fell 2% thanks to renewable energy purchases
- Supply chain emissions (server manufacturing in Asia) rose 25%
- Google's total carbon footprint in 2025: approx. 14.5 million metric tons CO2e — up 18% year-on-year
The scale of the problem
Google's data centers consumed over 42 million MWh in 2025, up from 30.6 million MWh the previous year. For context, this rivals the annual electricity consumption of New Zealand, Denmark, or Nigeria. A 37% increase in a single year is unprecedented even by Big Tech's growing energy appetite.
Google explicitly identifies AI as the primary driver: the increase stems from ongoing growth in Google Cloud, YouTube video streaming, and data center construction and operations supporting various AI products and services. The company acknowledges the trend is accelerating, not decelerating.
Energy consumption growth is not a new phenomenon. In 2024, Google's total electricity use rose 27% — which was itself a historical record at the time. The cumulative increase since 2019 exceeds 250%, meaning Google today requires more than three times the energy it consumed six years ago.
Decarbonization vs. AI buildout
For nine consecutive years, Google has claimed to match 100% of its electricity consumption with renewable energy purchases. In 2025, the company signed agreements covering 12 GW of net-new clean energy — its largest annual total on record. The result: operational emissions actually fell 2%, which Google describes as decoupling emissions growth from electricity growth.
The problem lies in the supply chain. Emissions from server and component manufacturing by Asian suppliers rose 25%, as those factories operate on grids still largely powered by fossil fuels. As a result, Google's total ambition-based emissions rose 18% to approximately 14.5 million metric tons CO2e — placing the company at the level of Ivory Coast in the global emitter rankings.
The company highlights long-term investments in advanced nuclear energy, fusion, enhanced geothermal, and long-duration energy storage. Google's total clean technology investments exceeded $3.8 billion between 2010 and 2025, expected to bring 7.5 GW of capacity online.
Natural gas in the background
Michael Thomas, CEO of the Cleanview data platform tracking renewable energy and data center projects, points to a concerning detail in Google's energy strategy: the company's $40 billion investment in Texas data centers may include a campus potentially powered by a 933-megawatt natural gas power plant without carbon capture. That facility could produce 4.5 million tons of CO2 annually. Google noted it has not yet signed an agreement specifying how much power its data center would draw from that plant.
This highlights a real conflict between stated climate policy and the practical requirements of building AI infrastructure at scale. Clean energy sources simply do not come online fast enough.
Why this matters
Google's report is the first detailed, audited disclosure from a major AI player showing the cumulative energy costs of the infrastructure race. For years, tech companies' declarations of 100% renewable energy were treated as sufficient — Google's report forces a more granular analysis.
A 37% single-year increase, combined with a 25% rise in supply chain emissions, demonstrates that renewable energy certificates do not neutralize actual environmental impact. For regulators and ESG investors, this is a warning signal: AI scaling has real, measurable environmental costs that do not disappear through carbon offsets.
For Google itself, the report shows the company cannot meet its own climate commitments at its current pace.
What's next
- Google announced a review of its energy strategy for new Texas campuses — a decision on a potential agreement with the 933 MW gas plant is expected by end of 2026
- The European Commission is developing mandatory energy reporting requirements for large data centers — Google's report will be cited as a baseline in those proceedings
- Microsoft, Amazon, and Meta are expected to publish their own environmental reports in Q3 2026, and they will be directly compared against Google's figures
Sources
- Ars Technica — Google's AI buildout drove 37% increase in electricity use in 2025
- Google — 2026 Environmental Report
- Cleanview — Google's data center power strategy
