The Material Footprint of Our Digital Lives
Digital technology may seem immaterial, but it relies on energy-intensive infrastructure, scarce metals and short-lived devices. Understanding its impact enables more responsible use without giving up its benefits.
An email travels in a second, a video starts instantly, and our photos float in a “cloud” that seems detached from the physical world. This is an illusion.
Behind that apparent weightlessness are data centres, millions of kilometres of cables, satellites and, above all, billions of physical devices.
Manufacturing, the problem's blind spot
It may seem counterintuitive, but for most devices the majority of the impact occurs before they are used for the first time.
Manufacturing a smartphone requires metals, some of them scarce, long before the device is switched on. Extending the life of equipment is by far the most effective digital action.
Mining cobalt, lithium, copper and rare earth elements consumes energy and water and is associated with local pollution and social tensions in mining regions.
Rapidly expanding uses
Video streaming, automatic backups, videoconferencing and artificial intelligence are driving relentless growth in computing and storage demand, along with the electricity consumed by data centres and networks. Digital sufficiency does not mean abandoning technology, but using it in proportion to real needs.
The main measures, from most to least effective, are:
- Keep equipment for longer: this is the most effective action by a wide margin.
- Repair and buy refurbished devices instead of replacing them.
- Adjust streaming quality to the actual need.
- Remove unnecessary files, storage and subscriptions.
- In France, digital technology represents 4.4% of the carbon footprint according to ADEME.
- Equipment manufacturing accounts for most of the impact, making longer device lifetimes the main lever.
- Digital sufficiency means proportionate use, not giving technology up.