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by Projet Celsius
Projet Celsius
AI Impact Database
Aerial view of the Google data centre in Council Bluffs, Iowa
Database topicClimate

Major AI services

The major assistants worldwide: one day of ChatGPT, Gemini and Le Chat, and one question put to each.

1 question · worldQuestion to Claude, Projet Celsius estimate0.14gCO2eQuestion to Gemini0.11 gQuestion to Claude0.14 gQuestion to ChatGPT0.16 g0.3 Wh of electricity per use, estimatedOne use, life cyclecalculation of the database
Electricity · 2025Emissions of one kilowatt-hour by country of the servers458gCO2e/kWhPoland589 gWorld458 gFrance41.4 gLife cycle, the same source everywhereEmber, 2025

Emissions of one question, 4 assistants

By assistant, with its own source4 assistants

  1. Question to Gemini0.11 gCO2e
  2. Question to Claude0.14 gCO2e
  3. Question to ChatGPT0.16 gCO2e
  4. Le Chat, LCA1.14 gCO2e
Linear scale. Values published or calculated by the database depending on the entry, sources in each entry. For calculated values, servers worldwide.

All the entries of the topic

8 entries, each with its entry page: composition, assumptions and sources. With no named source, the value is a calculation of the database.

Uses

By assistant, with its own source4

Territories

Global services4

Header photo: Chad Davis, Wikimedia Commons, CC BY 2.0.

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The other topics of the database

Database topicCities, territories, populationsPrevious topicThe 15 entriesDatabase topicElectricity and data centresNext topicThe 11 entriesDatabase topicWaterThe 8 entries

Across the hub

The reference chartsFrom the pollution of each AI to the electricity used by data centres, each with its data and sources.See the chartsWorld mapsCarbon intensity of electricity, low-carbon share, water stress, country by country.Explore the mapsThe calculation toolsEstimate the footprint of your uses, compare the country of the servers, browse the orders of magnitude.Open the tools

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An error, a source to add, a methodology question, a press request: write to us. Guillaume Pakula, Clément Reynaud, Sébastien Pierfederici and Alexandre Veilly will reply.

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Projet Celsius, which runs this hub, also helps companies measure and reduce the footprint of their AI use.

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