The Internet Has a Carbon Problem Nobody Talks About

The internet feels weightless. Data travels invisibly. Platforms load instantly. Nothing smokes or burns. It is tempting to think of digital activity as separate from the physical world of energy and emissions.

It is not. The infrastructure that makes the internet function, including undersea cables, mobile towers, routers, servers, and the data centres that house them, consumes somewhere between 3 and 4 percent of global electricity and generates a comparable share of global carbon emissions. That puts it roughly on par with the aviation industry, which receives considerably more public and regulatory attention.

Where the Emissions Come From

The largest single source of digital carbon emissions is data centres. These facilities run continuously, consuming enormous quantities of electricity for computation and for the cooling systems that prevent servers from overheating. In 2022, data centres accounted for an estimated 1 to 1.5 percent of global electricity demand.

Network transmission, the infrastructure that carries data from data centres to devices, accounts for a further significant share. End-user devices, including smartphones, laptops, and televisions, add more. The relative contribution of each segment varies by activity: streaming video is network-intensive; cryptocurrency mining is compute-intensive; regular web browsing sits somewhere between.

The Growth Problem

Global internet traffic has roughly doubled every three years for the past decade. Demand for video streaming, cloud computing, and increasingly AI inference, where trained models respond to user queries in real time, is accelerating this growth. The efficiency gains that the industry has achieved, primarily through more efficient processors and better cooling systems, have so far roughly kept pace with demand growth. There is no guarantee this will continue.

AI is a particular concern. Training a large language model can generate hundreds of tonnes of carbon dioxide equivalent. Inference, the ongoing process of responding to user queries, is less intensive per query but adds up across billions of interactions. As AI becomes embedded in search, productivity tools, and consumer applications, the compute demand associated with it is projected to grow substantially.

What the Industry Is Doing

The major cloud providers, Amazon Web Services, Microsoft Azure, and Google Cloud, have all made significant investments in renewable energy procurement and efficiency improvements. Google has operated carbon-neutral data centres since 2007 and has made commitments to operate on 24/7 carbon-free energy by 2030. Microsoft has committed to being carbon negative by 2030 and to removing all its historical emissions by 2050.

These are meaningful commitments. They are also made by the same companies investing most heavily in AI infrastructure expansion. Whether the renewable energy procurement will keep pace with the growth in demand remains an open question.

What Users Can Do

Individual action matters less here than systemic change, but it is not irrelevant. Choosing streaming quality appropriate to the screen you are watching on, using ad blockers which reduce data transfer, keeping devices longer, and being selective about AI tool use for tasks that do not require it are all meaningful at the margin.

More importantly, understanding that digital activity has physical consequences changes how we think about regulation, procurement, and infrastructure investment. The internet is not weightless. It runs on energy, and that energy has to come from somewhere.