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For years now, the environmental cost of going digital has often been overlooked. Paperless billing, digital documents, cloud storage and online communication have all become synonymous with reducing waste and saving resources. Yet as our lives become increasingly dependent on digital technology, a new conversation is beginning to emerge. Behind every email, streamed film, cloud backup and artificial intelligence query lies a vast physical infrastructure, one that consumes significant amounts of electricity and water.
Over the past year, growing attention has been paid to the environmental footprint of data centres and artificial intelligence, with parliamentary inquiries, academic research and industry reports highlighting the scale of the resources required to power our online world. While digital technologies undoubtedly bring enormous benefits, they are not without environmental costs. As more and more of our lives move from paper to screens, understanding those hidden impacts has never been more important.
Much of the internet feels intangible. Files are uploaded ‘to the cloud,’ emails are sent instantly across the world and AI tools appear to generate responses effortlessly. In reality though, there is nothing immaterial about these digital tools. Every photograph stored online, every streamed television programme and every search request is processed and stored in large-scale data centres filled with thousands of servers operating around the clock.
These facilities form the backbone of the digital economy, providing the computing power behind websites, cloud storage, banking systems, streaming platforms and, increasingly, artificial intelligence. Keeping them running requires not only electricity to power servers but also cooling systems to prevent equipment from overheating.
According to the International Energy Agency (IEA), data centres currently account for around 1.5% of global electricity consumption, with demand expected to grow significantly as AI usage increases. The agency estimates that electricity demand from data centres worldwide could more than double by 2030, driven largely by increasingly demanding AI models and expanding cloud computing services.
Artificial intelligence has become a particular focus of this discussion. Unlike a simple internet search, AI systems require substantial computing power both during training and when responding to user requests. Large language models process enormous volumes of data across powerful graphics processing units (GPUs), consuming considerably more energy than many traditional digital tasks. And energy is only part of the picture, water has also become an important environmental consideration.
Many modern data centres use water-based cooling systems to maintain safe operating temperatures. Research published by the University of California, Riverside, found that AI systems can indirectly consume significant quantities of fresh water through these cooling processes. While exact figures vary depending on location, climate and specific infrastructure, the study highlighted how rapidly growing AI use could place increasing pressure on water resources, particularly in regions already experiencing water stress.
These findings have prompted wider discussions among policymakers about how future digital infrastructure should be developed sustainably. In the UK, parliamentary committees have begun examining the opportunities and challenges presented by AI, including the energy demands associated with expanding computing infrastructure and the need for sustainable and resilient power supplies.
None of this means that digital technology is inherently unsustainable. In many situations, digital systems can reduce travel, improve efficiency and replace resource-intensive processes. Video conferencing can eliminate flights, online banking reduces the need for printed statements if customers choose, and digital collaboration allows organisations to work more efficiently across long distances.
The important takeaway is that digital services are not environmentally free simply because they are (to most) invisible.
Unlike a printed document sitting on a desk, digital information requires continuous infrastructure. Every file stored in the cloud remains on physical servers that require electricity twenty-four hours a day. Every streamed film depends upon networks, servers and data transmission equipment operating continuously behind the scenes.
As AI becomes more deeply integrated into everyday life, from online searches to customer service and education, these infrastructure demands are expected to increase further. This has led researchers, technology companies and governments alike to explore more energy-efficient chips, improved cooling technologies and greater use of renewable electricity to power future data centres.
This conversation has encouraged a broader rethink about sustainability itself. Rather than assuming digital is always greener than physical alternatives, many experts now advocate assessing the full life cycle of products and services. Environmental impacts depend on a wide range of factors, including how electricity is generated, how often something is used, how materials are sourced and how products are disposed of or recycled.
Paper provides an interesting example of this more balanced approach. Like any manufactured product, paper does have an environmental footprint. However, it is also one of the most widely recycled materials in the UK, with collection and recycling systems well established. When sourced from responsibly managed forests, paper comes from a renewable raw material, and the fibres themselves can be recycled multiple times before reaching the end of their usable life.
The point here is not that one medium should replace another entirely, but that every choice carries consequences. A digital document avoids paper consumption, yet relies on energy-intensive infrastructure. A printed document requires physical resources but can often be recycled, stored without electricity and retained for years without ongoing energy use. Sustainability is now about understanding these trade-offs rather than relying on assumptions.
For individuals, this conversation serves as a reminder that our online lives are supported by real-world infrastructure, even if it isn’t obvious. Every email, streamed playlist, cloud backup and AI-generated response depends on physical buildings, electrical grids, water supplies and complex global networks operating continuously behind the scenes.
The digital revolution has transformed the way we live and work, but it has not removed the environmental costs of communication and information, it has simply changed where those costs occur. As we continue to embrace new technologies, recognising the resources that power our digital world allows us to make more informed decisions about sustainability.
Paper and digital technologies both have important roles to play, and understanding the strengths and impacts of each is an essential part of building a more balanced and environmentally conscious future.
