The dramatic resignation of Ilya Sutskever, the chief scientist of OpenAI, which is behind artificial intelligence and large language models like OpenAI’s ChatGPT, has reinvigorated public debates on the future of AI and its exorbitant costs. Beyond the many acknowledged concerns, such as AI safety or the future of work and creativity, there is a trade-off that will be no less transformative. AI is one of the most energy-intensive modern IT undertakings. The world, concerned with carbon emission, may not be ready.