AI, Tech & Energy: How Google Powers a Sustainable Future
Few companies wield as much global influence as Google.
As the tech giant powers forward in AI development, its environmental footprint is under increased scrutiny.
Google’s 2025 Environmental Report outlines major gains in clean energy, water stewardship and emissions-saving technologies, but also reveals the growing climate cost of its AI ambitions, particularly in data centre and supply chain emissions.
AI’s dual impact
AI is central to Google’s operations and sustainability strategy.
The company’s tools, including Google Maps’ fuel-efficient routing, Nest thermostats and the Solar API, helped others avoid 26 million metric tons of CO₂e in 2024, equivalent to the annual emissions from 3.5 million US homes.
AI also powers predictive climate modelling, city traffic optimisation and disaster response tools.
New Gen AI methods now support flood, heatwave and wildfire planning at city level, while Google’s FireSat satellite can detect classroom-sized wildfires and update global imagery every 20 minutes.
Google was ranked 18th in Sustainability Magazine’s Top 250 Most Sustainable Companies 2025 list.
Sims Witherspoon, Climate Action Lead at Google DeepMind, says: “AI is not a ‘silver bullet’ for the climate crisis.
“As one tool among the many required, we do need its speed and scale to help us understand climate change, to optimise current infrastructure and to accelerate breakthrough science.”
Greening data centres
Data centres remain both the backbone of Google’s AI services and one of its biggest environmental liabilities.
Google has invested in next-gen infrastructure, such as the Trillium TPU, which is 67% more efficient than its predecessor and the Ironwood TPU, nearly 30 times more power efficient than the 2018 Cloud TPU.
On average, Google’s data centres are now 1.8 times more energy efficient than typical enterprise facilities.
Despite these advances, AI workload growth continues to drive emissions.
Clean energy deployment is not yet keeping pace globally and achieving 24/7 carbon-free energy remains subject to regulatory and market constraints.
To support its clean energy transition, Google has signed contracts for more than 8GW of clean energy and made history with the first-ever corporate agreement for nuclear energy from small modular reactors.
Google's supply chains
While operational emissions are improving, supply chain pollution is rising.
When all categories are included, not just those in Google's “ambition-based” metric, total emissions reach approximately 15.2 million metric tons of CO₂.
That’s comparable to the output of 40 gas-fired power plants.
In response, Google is scaling its commitment to carbon dioxide removal (CDR), tripling its 2023 investment to US$100m in 2024.
The company has backed high-durability solutions like direct air capture (DAC), biochar and enhanced rock weathering.
It also funds natural carbon sinks and co-founded Symbiosis to set forestry project standards.
Yet challenges remain. In 2024, just 4.4% of all booked CDR was delivered.
Market concentration is high, just four buyers, including Google, account for 80% of purchases, and delivery lags behind financial commitments.
Urban Sustainability and the Role of AI
Recognising that two-thirds of the global population will live in cities by 2050, Google is using AI to enhance urban sustainability.
Project Green Light adjusts traffic light timings to reduce stop-go traffic and cut emissions, using existing infrastructure, without new hardware or software requirements.
Other tools include the Tree Canopy tool, now in nearly 350 cities, which helps local governments identify where to plant trees to cool urban heat islands.
Google Maps and Search now integrate wildfire boundaries and real-time alerts, aided by AI models and satellite imaging.
This system has been expanded to more than 20 countries, covering more than 40 fires in southern Europe and reaching 1.4 million people in one week.
Adam Elman, Sustainability Lead for EMEA at Google, says: “As wildfires continue to impact communities around the world, Google is expanding our AI-enabled wildfire tracking to 15 countries across Europe and Africa.
“We know that people turn to Google when they need timely information – this is just the latest example of the many ways we're using AI to help them find the information they need as our climate changes.”
These urban-focused innovations reflect Google's belief that digital technology, while not a cure-all, can accelerate climate adaptation and resilience at scale.
Google’s 2025 Environmental Report reflects a company caught between climate ambition and AI-driven growth.
Its achievements, from reducing data centre emissions to investing in next-generation carbon removal, are significant.
But rising supply chain emissions and the enormous resource demands of AI present steep challenges.
As Google eyes its 2030 net zero goal, it must continue balancing innovation with transparency and environmental accountability.
