Digital technology has conquered our lives at lightning speed. In the space of a few decades, it has become an integral part of our daily activities, our social interactions, our ways of working and learning. Computers, smartphones, connected objects... These indispensable tools have created a new era of extraordinary opportunities(1).
But this digital revolution is not without its dark side. Behind the apparent immateriality of data and the dematerialization of uses lies a very physical reality: the major environmental impact of digital technologies. Depletion of natural resources, pollution linked to the extraction of rare metals, energy consumption and greenhouse gas emissions for the production of this energy... Digital technology has become a major player in the ecological crisis.
There is an urgent need to act, and the first step is education. Making tomorrow's citizens more aware of the environmental challenges posed by digital technology, and giving them the keys to adopting more responsible behaviors, is a challenge that schools must fully take up. Our ability to build a sustainable digital society, mindful of its footprint on the planet, is at stake. It's a vital challenge for which future generations must be prepared from the earliest age.
An unsuspected environmental cost
The other side of the digital society
We have become accustomed to seeing digital technology as something immaterial, almost magical. Our data seems to float in an ethereal cloud, our instantaneous exchanges to take place as if by magic. But this apparent lightness hides a very tangible, resource-hungry physical substratum.
Behind every state-of-the-art smartphone lies the extraction of dozens of precious or rare metals. Behind every Google query, gigantic energy-hungry server farms are in operation 24 hours a day. Today, the digital sector consumes 4% of the world's electricity, generates 4% of greenhouse gas emissions, and is seeing its footprint grow by 9% a year. At this rate, it could account for 7% of global emissions by 2040, as much as cars do today(2).
And this is just the tip of the iceberg. The environmental cost of digital technology extends to every stage of its life cycle, from production to end-of-life.
Effects at every stage of the life cycle
It all starts with the manufacture of electronic devices. Computers, tablets, connected objects... Their production requires a wide variety of materials: petroleum-based plastics, common metals such as copper, aluminum and tin, and rare or precious metals such as gold, silver, cobalt and tantalum.(3) Intensive mining of these resources depletes natural reserves and heavily pollutes ecosystems.(4) It also requires huge quantities of water and energy.
Once produced, the operation of our digital tools also takes a heavy ecological toll. Every e-mail sent, every photo liked, every video broadcast feeds gigantic data centers that run non-stop. These consume almost 4% of the world's electricity, more than all air traffic(5) , and their consumption is soaring with the explosion of Internet traffic.
Finally, digital technology poses a huge challenge when our equipment reaches the end of its useful life.(6) Less than 20% of the 50 million tonnes of electronic waste produced each year are currently recycled.(7) Uncollected equipment often ends up in open dumps in developing countries, contaminating soil and groundwater with toxic substances such as mercury, lead and beryllium.
Faced with these many facets, we need to rethink our relationship with the digital world, and this requires first and foremost awareness and education.
Schools: key players in raising awareness
Deconstructing the myth of immaterial digital technology
In order to adopt more environmentally-friendly digital behaviors, we need to understand the necessity of doing so. Yet today, most users are unaware of the environmental impact hidden behind their screens. According to a 2020 study, most French users feel poorly informed on the subject.(8)(9) For the majority, sending an e-mail or storing a photo online is a trivial, "dematerialized" gesture, with no consequences.
Schools have a key role to play in deconstructing these preconceived ideas. It's essential to explain to students how digital technology actually works: data centers and their electricity consumption, networks and their carbon footprint, rare metals in components... These are complex concepts that can be approached progressively and adapted to each level, from elementary school to high school.
The challenge is to make this environmental cost visible and tangible, by giving meaningful orders of magnitude. For example, explaining that an e-mail with a 1 MB attachment emits 19 g of CO2, the equivalent of leaving a light bulb on for 1 hour(10) , or that an Internet search has the same carbon footprint as 3 minutes of lighting an incandescent bulb. These are striking figures that prompt us to question our own practices.
Developing the skills of digital eco-citizens
But raising awareness is not enough. Schools must also give students the concrete means to take action, by developing their skills as digital eco-citizens. The aim is to instill, from an early age, the right reflexes for a more sober and reasoned use of digital tools.
This begins with the acquisition of everyday digital eco-gestures (11): switch off devices completely rather than leaving them on standby, sort through e-mails and files to avoid unnecessary storage, uninstall unused applications, opt for wifi rather than 4G or 5G... These are all small, easy-to-adopt reflexes that, when put together, can significantly reduce our environmental footprint.
Beyond individual gestures, we also need to develop a more responsible approach to our digital consumption choices. Prefer reconditioned, eco-designed or labelled devices, opt for service providers committed to a green approach (green web hosts, eco-responsible search engines...), make your equipment last as long as possible... These are all reflexes that need to be anchored in order to steer the market towards more sustainable offerings.
All these skills need to be integrated across all school subjects, and not just in courses on sustainable development or technology. Using the digital world responsibly must become a way of life as fundamental as respect for others or a critical approach to information. It's a prerequisite for training responsible, committed digital citizens.
Towards a sustainable, responsible digital future
Rethinking our uses and technologies
Educating students about the environmental challenges of digital technology is an essential first step. But to build a truly sustainable digital society, we need to rethink our entire relationship with technology. This means questioning our current uses and modes of development, which are based on ever more and ever faster.
At an individual level, adopting a responsible digital approach begins with more reasoned use.(12) This means questioning the relevance and real usefulness of each new device, each new application downloaded. Prioritizing quality over quantity, durability over obsolescence. Taking the time to sort through your data rather than storing everything by default. These are profound changes in mentality, which run counter to the constant injunction to consume and renew.
But it's not just individuals who must take responsibility. It's also up to digital companies to transform their approach, by placing environmental impact at the heart of their strategy. This means eco-designing equipment to make it less energy-intensive, more durable and easier to recycle, developing optimized algorithms and software, and transitioning data centers to renewable energies. These are just some of the technological innovations that can be harnessed to promote sustainability(13).
A democratic and societal challenge
Ultimately, the issue of digital sustainability goes beyond the technological or environmental sphere. It touches on much broader democratic and societal issues. For behind the digital revolution's promises of emancipation and universal progress lie the risks of fracture and exclusion for those without access(14).
At a time when the ecological footprint of digital technology is exploding, nearly 40% of the world's population is still unconnected(15). This divide is compounded by growing inequalities in exposure to pollution (mining, electronic waste, etc.), concentrated in the countries of the South. At a time when digital technology is invading all spheres of life, not being able to take part in it is becoming a powerful factor in social and economic exclusion.
Building a responsible digital society therefore also means ensuring that no-one is left behind. This means thinking of digital inclusion as a fundamental right. It also means questioning our technological development models: rather than racing ahead to ever greater performance and functionality, we need to give priority to "low tech" innovations that are simpler, more accessible and more frugal.
These are complex challenges that call for awareness and the mobilization of the whole of society. Schools have a key role to play in raising the awareness of tomorrow's citizens. But beyond that, we need to collectively define a real political project. To harness the transformative power of digital technology for a more sustainable and inclusive future.
At a turning point
Digital technology is at a turning point in its history. Having revolutionized our lifestyles and propelled our societies into a new era, it now faces an existential challenge: that of its own sustainability. The facts are clear: as things stand, the unbridled development of our digital uses is leading us straight into the wall, with potentially devastating environmental consequences.
Faced with this reality, the first lever for action is education. By raising students' awareness of the ecological challenges posed by digital technology, and giving them the keys to more responsible behavior, schools can play a decisive role in changing course. It can lay the foundations for a new digital culture, in which awareness of environmental impact becomes as fundamental as the handling of tools.
But responsibility cannot rest with individuals alone. What's needed is an in-depth transformation of our digital model. This requires radical technological innovation, from eco-friendly data centers to eco-designed devices and eco-responsible algorithms. But it also requires a more global paradigm shift, placing environmental and social issues at the very heart of digital development.
Building a sustainable and inclusive digital world is one of the major challenges of the 21st century. It's a challenge that concerns us all - citizens, businesses and public decision-makers alike. And it calls for unprecedented mobilization and creativity to invent new models. Schools will play a key role in this metamorphosis, for it is from the earliest age that awareness and behavior are forged.
By making digital responsibility an educational priority, we are laying the foundations for a future where technological progress finally goes hand in hand with environmental and human progress. The key to a truly sustainable digital revolution.
Illustrations: Generated by AI - Flavien Albarras
References
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