AI’s excessive water consumption threatens to drown out its environmental contributions
The promise of AI comes at the expense of water availability and quality.
Water is needed for development, production and consumption, yet we are overusing and polluting an unsubstitutable resource and system.
Eight safe and just boundaries for five domains (climate, biosphere, water, nutrients and aerosols) have been identified beyond which there is significant harm to humans and nature and the risk of crossing tipping points increases. Humans have already crossed the
safe and just Earth System Boundaries for water.
To date, seven of the eight boundaries have been crossed, and although the aerosol boundary has not been crossed at the global level, it has been crossed at city level in many parts of the world.
For water, the safe and just boundaries specify that surface water flows should not fluctuate more than 20 per cent relative to the natural flow on a monthly basis; while groundwater withdrawal should not be more than the
recharge rate. Both of these boundaries have been crossed.
These thresholds have been crossed even though the minimum needs of the world’s poorest to access water and sanitation services
have not been met. Addressing these needs will put an even greater pressure on
already-strained water systems.
AI’s potential
Technological optimists argue that artificial intelligence (AI) holds the potential to solve the world’s water problems. Supporters of AI argue that it can help achieve both the environmental and social
Sustainable Development Goals (SDGs), for example by designing systems to address shortages of teachers and doctors, increase crop yields and manage our energy needs.
Understand how AI is changing society
In the past decade, research into this area has grown exponentially, with potential applications including increasing
water efficiency and monitoring in agriculture,
water security and
enhancing wastewater treatment.
AI-powered biosensors can more accurately
detect toxic chemicals in drinking water than current quality monitoring practices.
The potential for AI to change the water used in
agriculture is evident through the building of smart machines, robots and sensors that optimize farming systems.
For example,
smart irrigation automates irrigation through the collection and analysis of data to optimize water usage by
improving efficiency and
detecting leakage.
As international development scholars who study the relationship between water, the environment and global inequality, we are curious about whether AI can actually make a difference or whether it exacerbates existing challenges. Although there is peer-reviewed literature on the use of AI for managing water and the SDGs, there are no peer-reviewed papers on the direct and indirect implications of AI on water use.
AI and water use
Initial research shows that AI has a significant water footprint. It uses water both for
cooling the servers that power its computations and for producing the energy it consumes. As AI becomes more integrated into our societies, its water footprint will inevitably grow.
The growth of ChatGPT and similar AI models has been hailed as “
the new Google.” But while a single Google search requires
half a millilitre of water in energy, ChatGPT consumes
500 millilitres of water for every five to 50 prompts.
AI
uses and
pollutes water through related hardware production. Producing the AI hardware involves resource-intensive mining for rare materials such as silicon, germanium, gallium, boron and phosphorous. Extracting these minerals has a
significant impact on the environment and contributes to water pollution.
Semiconductors and microchips require large volumes of water in the
manufacturing stage. Other hardware, such as for various
sensors, also have an associated water footprint.
Data centres provide the physical infrastructure for training and running AI, and their energy consumption
could double by 2026. Technology firms using water to run and cool these data centres potentially require water withdrawals of 4.2 to 6.6 billion cubic metres by 2027.
By comparison,
Google’s data centres used over 21 billion litres of potable water in 2022, an increase of 20 per cent on its 2021 usage.
Training an AI at the computing level of a human brain for one year can cost
126,000 litres of water. Each year the computing power needed to train AI
increases tenfold, requiring more resources.
Water use of big tech companies’ data centres is grossly underestimated — for example, the
water consumption at Microsoft’s Dutch data centre was four times their initial plans. Demand for water for cooling will only
increase because of rising average temperatures due to climate change.
Conflicting needs
The technology sector’s water demand is so high that communities are protesting against it as it threatens their livelihoods. Google’s data centre in drought-prone The Dalles, Ore. is sparking concern as it uses a
quarter of the city’s water.
Taiwan, responsible for 90 per cent of the world’s
advanced semiconductor chip production, has resorted to cloud seeding, water desalination, interbasin water transfers and halting irrigation for 180,000 hectares
to address its water needs.
Locating data centres
As water becomes increasingly expensive and scarce in relation to demand, companies are now strategically placing their data centres in the
developing world — even in dry sub-Saharan Africa,
data centre investments are increasing.
Google’s planned data centre in Uruguay, which recently suffered its
worst drought in 74 years, would require 7.6 million litres per day,
sparking widespread protest.
What emerges is a familiar picture of geographic inequality, as developing countries find themselves caught in a dilemma between the economic benefits offered by international investment and the strain this places on local water resources availability.
We believe there is sufficient evidence for concern that the rapid uptake of AI risks exacerbating the water crises rather than help addressing them. As yet, there are no systematic studies on the AI industry and its water consumption. Technology companies have been tightlipped about the water footprint of their new products.
The broader question is: Will the social and environmental contributions of AI be overshadowed by its huge water footprint?