Google emissions have surged 51% in five years – but it’s making progress in data center efficiency

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published 2 July 2025

Google emissions continue to climb amid the AI boom, new figures show, up 51% from 2019 to 2024 and 11% in the last year alone.

The tech giant’s total carbon dioxide emissions reached 11.5 million tonnes last year, according to its annual environmental report, marking a steep increase on the 7.6 million tonnes recorded in 2019.

A key factor behind this increase lies in the huge strain placed on data center infrastructure by generative AI - and it’s an issue that Google isn’t alone in tackling.

The International Energy Agency warned that AI will chew through the same amount of energy as Japan by 2030, with emissions from leading AI companies up by 150% since 2020.

There are different types of emissions, and Google has made headway in curtailing impact across a number of areas. Scope 1, for example, refers to sources that a company directly owns, such as buildings.

Google cut this type by 8% year-on-year, the report noted. Meanwhile, Scope 2 refers to indirect emissions from energy used by the company; those fell by 11%.

Scope 3 refers to supply-chain emissions, which climbed 22% year-on-year — and they make up 73% of Google's carbon footprint.

Google said that the increase in Scope 3 emissions were "primarily due to increases in data center capacity delivery (i.e., emissions generated from the manufacturing and assembly of technical infrastructure hardware — including for AI — and their logistics, as well as from data center construction)."

The company said it would continue to build out infrastructure next year and aimed to "decouple this growth from a proportional increase in emissions", in part by encouraging clean electricity in the supply chain and shifting to low-carbon data center construction.

Google emissions are being addressed

Still, the company highlighted its progress. Notably, it slashed data center energy emissions by 12%, with Google data centers using 84% less overhead energy than the industry average.

In a blog post examining the report, Kate Brandt, chief sustainability officer at the tech giant, said that despite a 27% increase in electricity demand for data centers, the company has “successfully decoupled our operational energy growth from its associated carbon emissions.

"This was largely due to more than 25 clean energy projects we’d contracted over the past several years — some as far back as 2019 — coming online in 2024.

Google also claimed that its products more than made up for its own emissions, noting that the combined emissions savings for 2024 alone from Nest thermostats, Google Earth Pro, Solar API, Google Maps' fuel efficient routing, and Green Light was 26 million metric tons of CO2 equivalent — more than double Google's own tally.

Cleaner energy required

Brandt admitted that "it's important to be up front about the hurdles we're facing", highlighting that total admissions were up 11% year on year.

She pinned the blame on slower progress with decarbonizing energy in some key regions, notably Asia Pacific, and said challenges remain with newer forms of energy production.

"When it comes to the next-generation clean technologies we need — the solutions that go beyond wind and solar like enhanced geothermal, advanced nuclear, nuclear fusion, and more — they’re still in their early stages," she added. "They’re not yet deployed at the scale required and can remain expensive to get online."

Google has teamed up with various energy companies on smaller modular reactors and other advanced nuclear, as well as geothermal and biomass, the report noted.

In last year's version of this research, Google saw a 13% increase year-on-year for GHG emissions and a 48% increase since 2019, with the report noting: "This result was primarily due to increases in data center energy consumption and supply chain emissions."

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