The ugly truth behind ChatGPT: AI is guzzling resources at planet-eating rates | Mariana Mazzucato

Big tech is playing its part in reaching net zero targets, but its vast new datacentres are run at huge cost to the environment

• Mariana Mazzucato is professor of economics at UCL, and director of the Institute for Innovation and Public Purpose

When you picture the tech industry, you probably think of things that don't exist in physical space, such as the apps and internet browser on your phone. But the infrastructure required to store all this information - the physical datacentres housed in business parks and city outskirts - consume massive amounts of energy. Despite its name, the infrastructure used by the cloud" accounts for more global greenhouse emissions than commercial flights. In 2018, for instance, the 5bn YouTube hits for the viral song Despacito used the same amount of energy it would take to heat 40,000 US homes annually.

This is a hugely environmentally destructive side to the tech industry. While it has played a big role in reaching net zero, giving us smart meters and efficient solar, it's critical that we turn the spotlight on its environmental footprint. Large language models such as ChatGPT are some of the most energy-guzzling technologies of all. Research suggests, for instance, that about 700,000 litres of water could have been used to cool the machines that trained ChatGPT-3 at Microsoft's data facilities. It is hardly news that the tech bubble's self-glorification has obscured the uglier sides of this industry, from its proclivity for tax avoidance to its invasion of privacy and exploitation of our attention span. The industry's environmental impact is a key issue, yet the companies that produce such models have stayed remarkably quiet about the amount of energy they consume - probably because they don't want to spark our concern.

Mariana Mazzucato is professor in the economics of innovation and public value at University College London, where she is founding director of the UCL Institute for Innovation & Public Purpose