Concerns are growing about energy demand, water consumption and the carbon footprint of artificial intelligence. This is not a silo disaster, but a reality that is putting increasing pressure on the power grid and has prompted the International Energy Agency to convene a global summit. Google proposes a four-pronged strategy to address it.
Four M’s. In a study published by IEEE, Google identifies four methods it calls the “4Ms” through which it claims large AI companies can reduce the carbon emissions of their machine learning algorithms by 100 to 1,000 times:
David Patterson, a Google Research researcher and lead author of the study, says the carbon footprint associated with training AI is more likely to be reduced than increased by following these four practices.
M for model. At the architectural level, new AI models increasingly incorporate advances aimed at increasing their efficiency. Google, Microsoft, OpenAI, or Meta use a technique called “knowledge distillation” to train smaller models that mimic a larger, “master” model that requires less energy.
They continue to train larger and larger models, many of which are not available to users, but in Google’s case, training these models accounts for 40% of the energy consumption, while the “inference” of the models available to users (processing responses) accounts for 60%.
While it may seem counterintuitive, the latest multimodal models released to the public, like Gemini 1.5 Pro and GPT-4o, are also more effective than their predecessors due to their ability to use different input methods, such as images and code: they learn with less data and examples than text-only models.
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M is for car. The vast majority of AI companies buy their hardware from Nvidia, which has specialized chips. But more and more companies are choosing the “Google model” to develop their own hardware, including Microsoft, OpenAI, and, in China, Huawei.
Google has been using its own “TPUs” (tensor processing units, which specialize in AI) for years. The latest generation, called Trillium, was announced in May and is 67% more energy efficient than the previous one, meaning it can do more calculations with less power, both in training and tuning, and in AI inference in Google’s data centers.
M for mechanization. Another counterintuitive idea: Cloud computing uses less energy than computing in an on-premises data center. Cloud data centers, especially those designed for artificial intelligence, contain tens of thousands more servers than an organization’s data centers and are equipped with better power distribution and cooling systems because they can pay for themselves.
Aside from the disadvantage of handing over data to large cloud companies like Amazon, Microsoft, or Google, cloud data centers have another distinct advantage: they are more modern, meaning they have machines more specialized in AI training and inference.
M for cartography. Another reason Google is calling for more cloud computing and less on-premises computing is the companies’ commitment to renewable energy. Some of these large data centers already run on 90% carbon-free energy.
Big tech companies are locating their new data centers in places where there are plenty of renewable resources, including the water used to cool servers, and this has led companies like Google, Microsoft and Apple to use 100% of the electricity in their operations from renewable energy sources and aim for zero net emissions by the end of this decade.
On the other hand, companies like Microsoft and OpenAI are unsure whether renewable energy supplies will be able to meet growing energy demand and are already looking to expand nuclear capacity either through small modular reactors or by investing in fusion research.
Image | Google Cloud
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