A practical guide for those who care about the health of the planet, and want to understand how the digital fits in.
Drawn from the book Le Ricette di Sloweb by Mauro Munzi, with an introduction by Marco Pozzi and an afterword by Pietro Jarre.
Browse
The digital is not invisible
Every e-mail we do not delete, every streaming video, every smartphone replaced before its time leaves a physical trace in the world: it consumes energy, emits CO₂, depletes rare resources. It is not a metaphor: it is a physical chain of real consequences.
The impact of the digital is, however, also social: the data we scatter every day builds an ever more precise profile of us, used to steer our purchasing decisions, our opinions, even our vote.
This book is not a technical manual. It is a collection of practical recipes for anyone who uses the internet: concrete, immediate actions that, added together, make a real difference. As in cooking: there is no need to become a chef. It is enough to know a few good recipes, and to want to cook them.
Curated by
Sloweb, the association for digital ethics and sustainability
With the contribution of experts, activists and communities across the world who believe in a sober, clean and fair technology.
Who this book is for
For those who already worry about the climate and want to understand how their smartphone fits in. For those who use the internet every day without knowing how heavily it weighs. For those who want to do the right thing, and only need to know how.
📮 New recipes coming soon: subscribe to the Sloweb newsletter at Sloweb.org
Contents
Section A, Everyday actions of the digital citizen
Ten practical recipes to reduce the impact of your everyday digital life: from the inbox to the software you use, from devices to artificial intelligence, to how to put your digital future in order. None requires technical skills.
✦ Sloweb Recipes · Recipes for a healthier digital ✦
01
Recipe #1E-mailEnergyCO₂
The e-mails we never delete
A full inbox is not just clutter. It is wasted energy, consumed every day, in silence.
333
billion e-mails every day
It is Thursday afternoon. You open your inbox: 3,847 unread messages. At least three thousand you will never open. But they are all there, on a server somewhere in the world, consuming electricity twenty-four hours a day: even while you sleep, even while you are on holiday, even when you have not opened Gmail for a week.
It is not a problem of untidiness. Every message takes up physical space on a server that needs electricity, cooling, maintenance. An infrastructure constantly on to keep purchase receipts from 2019, notifications from apps you no longer use, and newsletters you have never read.
A single e-mail with an attachment weighs as much as keeping a lightbulb on for 25 minutes.
Multiplied by the 333 billion e-mails sent every day around the world, the problem takes on a scale that is hard to ignore. Our inboxes are tiny personal data centres: and data centres are among the largest energy consumers on the planet.
Recipe card
Per-serving values
DifficultyEasy ★☆☆
Time1–2 hours
CostZero €
CO₂ savedup to 23 kg / year
Ingredients
💻
A connected computer
⏱
An uninterrupted hour
🔍
The “Search” function of your e-mail client
💪
Courage to press “Delete all”
📅
A monthly reminder to repeat
The Recipe
01
🔎
Search and select all
Type “Promo”, “Offer” or “Unsubscribe” in the search bar. Select all results and delete them in one go.
02
🚫
Unsubscribe before deleting
Open the most recent e-mail, scroll to the bottom, click “Unsubscribe”. Block the problem at the source.
03
📥
Empty the Bin right away
E-mails in the Bin still take up space on servers. Go to the Bin and click “Empty bin”.
04
🗂
Archive, do not pile up
Important e-mails go into folders. An empty inbox is a healthy inbox.
05
☁️
Check the heavy attachments
In Gmail: “has:attachment larger:5mb”. Download what you need, then delete the e-mail.
06
🔁
Schedule a monthly clean-up
20 minutes a month is enough. Like changing the water filter.
🚗 How much does your inbox pollute? In kilometres driven by a car
Annual estimate, based on 120 g CO₂ per km of a petrol car
Unread newsletters
≈ 17 km
Text-only e-mails
≈ 50 km
E-mails with attachments
≈ 208 km
Unfiltered spam
≈ 417 km
🚗
0417 km — Rome→Naples→Rome
🌍
Did you know?
If every internet user deleted 10 useless e-mails, we would save enough energy to light 40,000 homes for a year. The next time you press “Delete all”, remember you are not just tidying up: you are taking action.
✦ Sloweb Recipes · Recipes for a healthier digital ✦
02
Recipe #2SmartphoneHardwareRare earths
Your smartphone has already polluted
80% of the ecological footprint happens before you even switch it on for the first time.
83 kg
of CO₂ already emitted by the time of purchase
Inside your smartphone there are roughly 70 materials. Here are 5 you probably do not know.
CoCobaltBattery. 70% comes from the Democratic Republic of the Congo.
LiLithiumBattery cells. Extracted from salt flats in Chile and Argentina.
NdNeodymiumRare earths for speakers. Almost all from China.
TaTantalumCapacitors. Often extracted in conflict zones.
AuGoldElectrical connectors. Every smartphone contains around 0.03 g.
There is a moment of pure pleasure in peeling the cellophane off a brand-new smartphone. The object is cold, precise, immaculate: it looks born from nothing. In reality it comes from very far away.
Every smartphone is the result of a very long chain: mines in the Congo, smelters in China, factories in Vietnam, containers crossing oceans. 80% of the total environmental footprint has already happened before the courier rings your doorbell.
Producing a smartphone emits as much as a car trip from Milan to Naples and back.
The answer is not to give up the smartphone. It is to keep it longer. Every extra year of use dilutes that mountain of already-emitted emissions, and pushes back the environmental cost of the next purchase.
Recipe card
Per-serving values
DifficultyEasy ★☆☆
TimeA decision
CO₂ saved40–60 kg
Ingredients
📱
The smartphone you already own
🔋
A battery replacement (30–50€)
♻️
Or: a refurbished smartphone
🧠
The awareness that “new” is not always better
The Recipe
01
⏳
Keep it one more year
Going from 2 to 3 years cuts the annualised impact by 33%. Moving to 4 years halves it. It is the single most effective action you can take.
02
🔋
Replace the battery, if your device allows it
It costs between 30 and 60 € and extends the life of the device by 2–3 years. A dead battery is the main reason for early replacement.
03
♻️
Consider refurbished
Footprint up to 80% lower than new. It costs less and works exactly the same.
04
🗑
Do not put it in the bin
It must be taken to a certified WEEE collection point. It contains valuable and toxic materials.
05
📦
Donate it or sell it
A 3-year-old “old” phone is perfect for someone else. Back Market, Swappie, or simple word of mouth.
06
💬
Resist the “trade-in” offer
Before signing, ask yourself: does my current one still work? If yes, the answer is no.
🚗 How many car kilometres equal the production of your smartphone? It depends on how long you keep it.
83 kg CO₂ spread over its useful life, on an annual basis, converted into car kilometres (120 g CO₂/km)
Kept for 2 years
≈ 346 km / year
Kept for 3 years
≈ 231 km / year
Kept for 5 years
≈ 138 km / year
Buy refurbished
≈ 62 km / year
🚗
0346 km — Milan → Florence
🌍
Did you know?
Every year over 1.5 billion smartphones are produced. In Europe only 20% of electronic waste is properly disposed of.
✦ Sloweb Recipes · Recipes for a healthier digital ✦
03
Recipe #3StreamingVideoData centre
That evening on Netflix has a CO₂ tail
Every video travels thousands of kilometres of cables and crosses huge data centres before it reaches your screen.
60%
of internet traffic worldwide is video streaming
🏭
Data centre
fibre
🔀
Router
CDN
📡
Provider
WiFi/4G
📺
Your screen
CO₂
🌍
Atmosphere
On the sofa, favourite series, screen in the dark. It feels like the most still moment of the day. But at that very instant, thousands of kilometres of cables, dozens of routers and entire buildings full of servers are at work, just for you.
Every second of video travels an invisible path: from the data centre to the fibre optic, to the internet provider, to the home WiFi antenna, all the way to the pixel on the screen. Every step consumes electricity. Far more than one thinks.
An hour of 4K streaming is equivalent, in emissions, to driving about 4 km by car.
The problem is scale: Netflix alone serves over 200 million subscribers around the world every day. Video streaming on its own accounts for 60% of all global internet traffic: and that share grows every year.
Recipe card
Per-serving values
DifficultyEasy ★☆☆
Time2 minutes
Annual impactup to −30 kg CO₂
Ingredients
📺
The streaming service you already use
⚙️
Quality settings: Full HD instead of 4K
💻
A small screen when possible
🎵
Audio instead of video when you are not really watching
📥
“Download for later” function
The Recipe
01
📐
Lower the video quality
4K consumes 4× more data than HD. On a 13-inch laptop the visual difference is imperceptible. Set it in the service preferences.
02
📱
Small screen = small impact
A 55-inch television consumes 8× more than a laptop to watch the same video.
03
🎵
If you are not watching, listen
Music and podcasts consume 96% less than video. YouTube only for music? Switch to Spotify.
04
📥
Download instead of streaming
Watching a downloaded episode does not consume streaming data. Ideal for commuters and travel.
05
🌙
Watch in the evening
At night the grid uses more renewables. An evening stream often has a lower carbon footprint than an afternoon one.
06
🔌
Switch off the television, really
Standby mode consumes up to 3 W constantly. Use a power strip with a switch.
🚗 How much does 1 hour of streaming pollute? In car-kilometre equivalents
Per hour of viewing, converted into car kilometres (120 g CO₂/km). Values vary with the energy used by the data centre.
4K on a large TV
≈ 4.2 km / hour
Full HD on TV
≈ 2.5 km / hour
HD on a laptop
≈ 1.0 km / hour
Audio (podcast/music)
≈ 0.15 km / hour
🚗
04.2 km, crossing Milan by car
🌍
Did you know?
Global video streaming produces annual emissions comparable to those of a country like Spain. Changing the default resolution from 4K to HD is already one of those choices. Small on the screen, concrete for the planet.
Further reading
📖 Book
Sustainable Web Design
Tom Greenwood, 2021
🌐 Website
theshiftproject.org
Report on the impact of online video
🎬 Documentary
The Internet’s Dirty Secret
BBC Panorama, 2020
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✦ Sloweb Recipes · Recipes for a healthier digital ✦
04
Recipe #4Personal dataCookiesPrivacy
Every day, you give thousands of pieces of information about yourself
You do not see them. You do not hear them. But they build a portrait of you more precise than the one in your own imagination.
4.000+
companies gather data on you without your knowing
What is gathered on you, every time you go online →
📍LocationWhere you are, where you go, with whom
🛍PurchasesWhat you buy, how much you spend
❤️HealthSearches, apps, symptoms
🔍InterestsWhat you search for, what you read
🗳Political viewsSites, shares, likes
👥RelationshipsWho you talk to, and how often
When we click “Accept all” we do it almost by reflex: less than a second, then we move on. But that choice has consequences that last years.
In that moment we give the green light to dozens of companies (often more than a hundred per single site) to gather information about us. This is aggregated, resold, used to build an ever more precise profile: where you have been, what you have searched for, who you talk to, how much you are willing to pay.
Data is not the “new oil”. It is something more intimate: it is our identity, turned into a commodity.
It is not just about targeted advertising. It is about knowing our vulnerabilities in advance, and using that knowledge to steer our decisions, often without our noticing.
Recipe card
Per-serving values
DifficultyMedium ★★☆
Setup time30 minutes
CostZero–5 € / month
Ingredients
🦊
Firefox or Brave as a browser
🛡
The uBlock Origin extension (free)
🔎
DuckDuckGo as a search engine
✉️
“Disposable” e-mail for sign-ups
📱
App permissions review (30 min one-off)
The Recipe
01
🍪
Stop accepting everything
Look for “Reject” or “Only necessary”. By European law it has to be there. Often it is hidden, but it is there.
02
🛡
Install uBlock Origin
Free, open-source, automatically blocks thousands of trackers. Installs in 2 minutes.
03
🔎
Change your search engine
DuckDuckGo and Startpage: same results as Google, without tracking you. Switch in 30 seconds.
04
📱
Review your app permissions
Settings → Apps. Does the flashlight really need to know where you are? Remove the permissions that are not needed.
05
✉️
“Disposable” e-mail
SimpleLogin or AnonAddy create alias addresses that forward to your real e-mail without revealing it.
06
🗑
Ask for the deletion of your data
The GDPR gives you this right. Write to whoever unlawfully holds your data a “request for data deletion under article 17 GDPR”.
🕐 An ordinary day. The data you leave without knowing it.
It is not about CO₂ this time. It is about who you are, and who knows it.
7:30
You search for “pharmacy open near me” on Google
Google records the search, GPS location, time. It infers a possible health condition.
locationhealthbehaviour
8:15
You open Instagram on the train. You scroll for 12 minutes.
Meta records every post seen, every second of pause, every profile visited.
behaviourrelationshipslocation
12:45
You read an article on a news site. You click “Accept all”.
On average 87 third-party companies are notified of your visit within 50 milliseconds.
identitypolitics
22:30
You go to sleep. The phone does not.
Many apps keep gathering data in the background: location, movements, sleep habits.
locationhealthhabits
👁
Did you know?
Flight prices change according to your browsing history. Insurers in some countries use data from fitness trackers to calculate premiums. Your data does not describe who you are: it determines what you are offered, and at what price.
✦ Sloweb Recipes · Recipes for a healthier digital ✦
05
Recipe #5SoftwareOpen SourceEfficiency
The software you use has a weight we do not see
Every installed app, every automatic update, every open tab: real energy consumed in silence.
77%
of business software is never used
Open your computer. How many applications have you installed that you have not used for months? Probably more than you think. Each one runs silently in the background: updating, syncing, sending data to the manufacturer’s servers. All of this consumes real electricity, even when you are doing nothing visible.
A Microsoft study found that 77% of installed business software is never used. Not “rarely used”: never. And yet it keeps running, updating, consuming CPU cycles and bandwidth like an engine left running in the garage.
A computer kept on standby with 20 background apps consumes up to 4 times more than an optimised one, even with nothing visible happening.
Choosing lightweight, open-source software is not an ideological choice: it is a concrete choice with measurable impact. Free software tends to be more efficient, longer-lived, and has no commercial incentive to push needless updates that bloat devices and accelerate obsolescence.
Recipe card
Per-serving values
DifficultyMedium ★★☆
Time30–60 min
CostZero €
CO₂ savedup to 15 kg / year
Ingredients
📋
The list of installed apps
⏱
A free hour
🔍
Curiosity towards lighter alternatives
🌿
Openness to open source
The Recipe
01
📋
Take the inventory
Open the settings and look at how many apps are installed. How many did you actually use in the past month? That number will surprise you.
02
🗑
Uninstall the unused
Rule of thumb: if you have not opened it in 30 days, you do not need it. Uninstall without hesitation.
03
🌿
Explore lighter alternatives
LibreOffice instead of Microsoft Office, VLC instead of iTunes, Firefox instead of Chrome: fewer resources, same result.
04
🔕
Manage updates
Disable automatic updates where you can. Update intentionally, not in the background while you work.
05
🌐
Use web apps where you can
Many native apps have equivalent web versions. Less installed software = fewer background processes.
06
♻️
Choose green providers
When you buy software, check whether the vendor has sustainability commitments. There are certifications such as the Green Software Foundation.
⚡ How much energy does unused software waste? In kWh / year
Estimate for a computer with 20 installed apps, 8 hours / day of use
Background apps (syncing)
≈ 12 kWh
Unnecessary automatic updates
≈ 24 kWh
“Heavy” software idling
≈ 40 kWh
Continuous telemetry and tracking
≈ 68 kWh
💻
068 kWh, like keeping an oven on for 68 hours
💡
Did you know?
The Green Software movement estimates that optimising the code of existing applications could cut IT-sector emissions by 20-40%, without buying a single new device. Uninstalling a useless app is already the first step in that direction.
✦ Sloweb Recipes · Recipes for a healthier digital ✦
06
Recipe #6AttentionNotificationsDigital wellbeing
How many times have you looked at it today?
Every notification is designed to interrupt you. Every like is a micro-dose of dopamine. Take back your attention time.
160
times a day Italians check their smartphone
Try to remember the last time you waited for something, even just a few minutes, without looking at your phone. A red light, the lift, the three minutes while the coffee cools. For most people the answer is “I don’t remember”. Not because moments of waiting no longer exist: they do, exactly as before. It is that the hand goes to the pocket before anything one could call a conscious decision has even formed.
It is not about laziness or a lack of willpower: it is the predictable outcome of a system designed with great precision to produce exactly this behaviour. The smartphone is the most sophisticated device ever built to capture and hold human attention; the applications it contains are the product of billions of euros of research aimed at a single goal: making sure you keep using them for as long and as often as possible.
Infinite scroll, patented in 2006 by Aza Raskin, today produces 200,000 hours of unintentional use per day worldwide. Its own inventor has publicly called for its removal. No platform has eliminated it.
Italians check their smartphone on average 160 times a day: many of these unlocks last less than thirty seconds and end without anything meaningful having been done. Every notification that breaks the flow of work takes the brain between fifteen and twenty minutes to return to its previous level of concentration; according to the available research, up to 40% of the productive day of a connected worker is eaten away by digital interruptions.
Recipe card
Per-serving values
DifficultyEasy ★☆☆
Time30 min setup
CostZero €
ImpactAttention + sleep
Ingredients
📱
Your phone’s settings (Notifications, Screen Time)
⏰
A traditional alarm clock
🪟
A twenty-minute window per day without a screen
💬
Discuss it with your colleagues at work
The Recipe
01
🔕
Turn off non-essential notifications
Open the settings and review notification permissions app by app. Keep active only calls and urgent direct messages: everything else, from social to news, does not need to alert you in real time.
02
🛏
Phone out of the bedroom; never at the table
80% of people check their phone within five minutes of waking up. Keeping it in another room breaks the morning autopilot and improves sleep quality. An analogue alarm clock settles the question for good.
03
📊
Turn on screen-time monitoring
iOS and Android offer built-in tools that show hours per application. Looking at them once a week makes visible something that usually stays invisible: for many people, the data is surprising.
04
🗓
Define disconnection windows
Pick two or three moments in the day when the phone is off or in silent mode: meals, the first two hours of work in the morning, the hour before sleep. Starting with twenty minutes a day is enough.
05
🚶
One phone-free action per day
Walking the dog, doing the shopping, waiting for the bus: pick something you do every day and do it without the phone for a week. Not as a feat of willpower, but as an observation of what happens to your attention.
06
💼
Negotiate availability at work
If the expectation of an immediate reply is implicit but unstated, make it explicit with your manager and your team. Defining when you are reachable is not laziness: it is the minimum condition for there to be anything one could call recovery.
📱 How the loss of attention builds up over a working day
Estimate for a connected worker with notifications on across all devices
Notifications received per day
≈ 80
Interruptions that break concentration
≈ 40
Minutes to recover concentration (per interruption)
15–20 min
Productive time eaten by digital interruptions
≈ 40%
⏱
0up to 40% of the working day lost in unchosen interruptions
📜
Did you know?
The term “infinite scroll”, the mechanism that makes the feed scroll without ever reaching a bottom, was patented in 2006 by Aza Raskin. Years later, Raskin publicly said he regrets the invention and called for its removal. It is estimated to produce worldwide 200,000 hours of unintentional use per day. None of the main platforms has eliminated it.
Further reading
📖 Book
Irresistible
Adam Alter, Penguin Press, 2017
🌐 Organisation
humanetech.com
Center for Humane Technology, founded by former employees of Google and Meta
🎥 Video
Behavioural and digital compulsive use
Paolo Jarre · DEF 2024 · Sloweb.org
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✦ Sloweb Recipes · Recipes for a healthier digital ✦
07
Recipe #7WebSober designGreen hosting
The site you visit every day could consume as much as a fridge
Not all websites are the same. Page weight, energy-hungry hosting, invisible trackers: the web has a footprint that is not seen.
900
Mt CO₂ / year from the internet — as much as global aviation
Open any news site. While the page loads, dozens of invisible things are happening: tracking scripts activating, uncompressed images arriving from distant servers, unused plug-ins consuming CPU. That site weighs perhaps 5 megabytes. Every time you go there. A homepage full of trackers is the digital equivalent of leaving every light in the house on when you go out.
The problem does not only concern users: it concerns those who design sites, those who choose hosting, those who install fifteen plug-ins when three would do. But as users we too can make choices that reward the most sober services, and flag for others when a site is needlessly heavy.
An “average” website emits around 1.76 g of CO₂ per page view. Multiplied by millions of visits per day, the numbers become significant.
Tools like websitecarbon.com let you measure the footprint of any site within seconds. Sites hosted on servers powered by renewables emit up to 90% less. The Green Web Foundation maintains a public, verified registry of providers with green hosting.
Recipe card
Per-serving values
DifficultyMedium-high ★★★
Time2–4 hours
CostLow
CO₂ savedvariable
Ingredients
🌐
websitecarbon.com (free)
🟢
thegreenwebfoundation.org
🔒
uBlock Origin (to block trackers)
📏
Google PageSpeed Insights
The Recipe
01
📊
Measure the weight of your site
Go to websitecarbon.com and enter any URL. You will find out the emissions per visit and a comparison with other sites. It is the first step.
02
🌱
Choose green hosting
Check on thegreenwebfoundation.org whether your provider uses renewable energy. If not, consider migrating.
03
🚫
Block incoming trackers
Install uBlock Origin in your browser. It cuts page weight by 20–40% and blocks advertising trackers.
04
🖼
Optimise the images
Images are often 60–70% of a page’s weight. Use squoosh.app to compress them without losing visible quality.
05
🔌
Reduce plug-ins and scripts
Every extra JavaScript script slows loading and consumes the visitor’s CPU. Keep only what is strictly necessary.
06
🎨
Adopt Sustainable Web Design
Principles: enable dark mode (saves energy on OLED), lean pages, system fonts, aggressive caching. Tom Greenwood’s book is the guide.
🌍 CO₂ per page view, comparison between site types
Grams of CO₂ per single visit, multiply by millions of visits / month
Optimised static site (green hosting)
≈ 0.15 g
Simple WordPress blog
≈ 0.60 g
“Average” site with trackers
≈ 1.76 g
Heavy e-commerce with video
≈ 5.00 g
🌐
05 g/visit × 1M visits/month = 5 tonnes CO₂/month
📡
Did you know?
The Green Web Foundation has verified that only 17% of websites worldwide are hosted on servers powered by renewable energy. Choosing green hosting is still going against the current: and that is precisely why every choice counts double.
Further reading
🌐 Website
sustainablewebdesign.org
guidelines for designing sustainable sites
🌐 Registry
thegreenwebfoundation.org
Verified list of hosting providers running on renewable energy
✦ Sloweb Recipes · Recipes for a healthier digital ✦
08
Recipe #8OrganisationsCDRGovernance
Does your organisation have a responsible digital policy?
Corporate Digital Responsibility is not just for large tech companies. It is for every organisation that uses digital tools, that is, all of them.
12%
of Italian SMEs have a formal CDR policy
Imagine a company that uses dozens of digital tools every day (e-mail, videoconferencing, management software, remote storage) but has never measured how much all of this weighs. It does not know how much energy its IT consumes, has no clear policies on customer data, does not know the terms of the contract with its remote-services provider. This is the norm, not the exception.
Every organisation that uses digital tools produces an impact: on how much data it collects, how it protects it, how much energy the infrastructure consumes, whether employees are exposed to techno-stress, whether the artificial intelligence systems in use amplify discriminatory bias. Corporate Digital Responsibility (CDR) is the set of values and practices to manage all of this consciously.
Corporate culture is “what happens when the managers leave the room”. A solid CDR is not a PDF document in a forgotten folder: it is a set of habits embedded in everyday practice.
Sloweb argues that CDR should be integrated into the business model, not added as decoration. An organisation that handles customer data responsibly, chooses remote-storage providers running on renewable energy, and trains staff on the conscious use of the digital obtains concrete benefits: more trust, lower legal risks, real savings.
Recipe card
Per-serving values (organisation)
DifficultyHigh ★★★
Time3–6 months
CostLow–medium
Value createdReputation + savings
Ingredients
📋
Audit of the current digital impact
👥
Management buy-in
📝
Written, shared guidelines
🎓
Training for all staff
The Recipe
01
🔍
Carry out a digital audit
Where does your IT infrastructure consume energy? What data do you collect? How many e-mails are sent internally without need? Measure before acting.
02
📄
Write a Digital Policy
A simple document (1–2 pages) that states: how we use data, which tools we prefer, how we manage devices at end of life.
03
☁️
Choose green remote infrastructure
AWS, Google Cloud, Azure: all have green options. Check server locations, those in Scandinavia or Iceland are often powered by renewables.
04
📵
Protect against techno-stress
Clear rules on notifications, out-of-hours e-mails, video meetings. The digital must serve people, not the other way round.
05
🎓
Train the staff
One hour a year of training on data, privacy and digital environmental impact changes behaviour. Use materials like these recipes.
06
📊
Measure and communicate
Include digital indicators in the sustainability report. Not for greenwashing: for real responsibility towards employees and stakeholders.
🏢 Where the digital impact of an average company concentrates
Percentage breakdown of IT emissions, SMEs 20–100 employees
Video meetings and collaboration
≈ 12%
E-mail and communication
≈ 22%
Remote storage and backup
≈ 33%
Corporate devices and hardware
≈ 43%
🏢
0%43% is reducible with device-longevity policies
📋
Did you know?
Since 2022 France has had a law requiring companies above 1,000 employees to measure and reduce their digital footprint. In Italy similar guidelines are being developed. Those who anticipate this change do not endure regulation: they lead it.
Further reading
🌐 Website
Sloweb.org/cdr
Sloweb CDR guidelines for businesses
📖 Standard
UNI/PdR 147:2023
Italian reference practice for digital sustainability in organisations
✦ Sloweb Recipes · Recipes for a healthier digital ✦
09
Recipe #9AISustainabilityAwareness
The artificial intelligence you use every day has already drunk 700,000 litres of water
Artificial intelligence is not just algorithms. It is water to cool the servers, electricity for millions of calculations, and the invisible labour of thousands of people.
550 t
of CO₂ emitted to train GPT-3 just once
You type a question. In less than a second an articulate, fluent, seemingly reasoned answer comes back. It looks like magic. In reality it is the result of a process that has consumed enormous resources: training GPT-3 emitted the equivalent of 550 tonnes of CO₂. Every single query to a large model consumes 10 to 100 times more energy than an ordinary web search.
But the cost is not only energy. The data centres of artificial intelligence consume water in huge quantities for cooling. And behind every model there is an invisible army of workers (often in developing countries) who label data, moderate violent content, correct errors: precarious, badly paid, psychologically wearing labour.
Every reply from a large language model requires about 500 millilitres of water to cool the servers. For a user making one hundred queries a day, that is 50 litres: half of daily domestic water use.
This does not mean artificial intelligence should be avoided. It means it should be used with awareness: choosing smaller, more efficient models when they are enough, preferring tools that are transparent about their impacts, not delegating to artificial intelligence tasks that a human can do better and with fewer resources.
Recipe card
Per-serving values
DifficultyMedium ★★☆
TimeGradual change
CostZero €
ImpactCultural + energy
Ingredients
🤔
The question: “Is artificial intelligence really needed?”
📊
Awareness of the hidden costs
🎯
Intentional use, not automatic
🔍
Curiosity for lightweight models
The Recipe
01
🤔
Ask yourself: do I really need AI?
Before opening a chatbot, ask: can I do this with an ordinary search? With a spreadsheet? With my own head? Artificial intelligence is not always the best answer.
02
⚖️
Choose lightweight models
For many tasks smaller, more efficient models are enough. GPT-4o mini, Mistral, Gemini Flash: less impact, often sufficient quality.
03
📝
Write better prompts
A precise prompt reduces iterations, and therefore consumption. Learning to “talk” to artificial intelligence effectively is also more ecological.
04
🏫
Teach critical AI in schools
Ask your children’s school to introduce lessons in digital civic education into the curriculum.
05
🔎
Demand transparency
Prefer providers that publish information about their energy impact and training data. Transparency is the bare minimum.
06
🤝
Support fair labour in AI
Organisations like Turkopticon document the conditions of annotation workers. Asking AI providers for fair-labour policies is legitimate.
💧 Water consumption to cool AI data centres, litres per activity
Estimates for large models (GPT-4 class), approximate figures to illustrate the proportions
10 traditional web searches
≈ 0.3 L
50 queries to a small chatbot
≈ 1.5 L
50 queries to GPT-4 class
≈ 5.0 L
Generating 100 AI images
≈ 8+ L
💧
0Training GPT-3: estimated 700,000 litres of water
🧠
Did you know?
As Luciano Floridi, philosopher of information, writes: “We need to bring people into the complexity” of the digital. Understanding what artificial intelligence is, who controls it and at what cost is the first step to using it without being used by it.
Further reading
📖 Book
Atlas of AI
Kate Crawford, 2021, AI as a physical industry
📄 Research
AI Water Footprint Study
UC Riverside, 2023, the water of AI
🌐 Website
mlco2.github.io
CO₂ calculator for ML model training
✦ Sloweb Recipes · Recipes for a healthier digital ✦
10
Recipe #10Digital legacyPrivacyPlanning
What happens to your data when you are no longer here
You have hundreds of accounts, years of photos, messages, digital memories. No one knows how to reach them. It is time to take care of it, before it is too late.
<5%
of users have set up digital legacy tools
Your mother dies. Her iPhone is locked. Inside it there are years of photos, voice messages, a digital diary you did not even know existed. You try calling Apple: they ask you for a death certificate, a notarised document, proof that you are the rightful heir. Months of waiting, forms, refusals. And in the end, in many cases: nothing.
It is not a rare case. Every year around 600,000 people die in Italy. Almost all of them with a smartphone, one or more e-mail accounts, years of photos in remote archives, active digital subscriptions. And yet less than 5% have ever set up a digital-legacy tool: and Italian law does not yet offer adequate safeguards.
It is not only a practical matter. Data is a record of a life: it deserves the same respect we give to a handwritten letter or a paper photograph.
There is a paradox few are aware of: those films on iTunes, those e-books on Kindle, that playlist curated over twenty years: they do not legally exist. When you buy digital content, you do not purchase the object: you purchase a personal licence that expires with you. Your heirs will inherit your physical devices, but not the legal right to the content you paid for.
Recipe card
Per-serving values
DifficultyEasy ★☆☆
Time2–3 hours one-off
CostZero €
ImpactPeace of mind + protection
Ingredients
📋
An inventory of your main accounts
👤
A trusted person as digital heir
🔐
A password manager with emergency access
✍️
30 minutes on Apple, Google, Facebook
The Recipe
01
📋
Take the inventory
Open a document and write down every service you use regularly: e-mail, remote storage, social, online banking, subscriptions. Not the passwords: just the list and what each one holds that matters. Often you discover you have many more accounts than you remembered.
02
🍏
Turn on Legacy Contact on Apple
If you have an iPhone with iOS 15.2 or later: Settings → [your name] → Sign-in & Security → Legacy Contact. An access key will be generated: print it and keep it with your important documents.
03
🔷
Inactive Account Manager on Google
Go to myaccount.google.com → Data & privacy → Inactive Account Manager. Choose how many months of inactivity must pass before Google alerts the people you have designated, and which data each of them can access.
04
👥
Manage your social profiles
On Facebook you can choose a legacy contact or request automatic deletion: Settings → About Facebook → Memorialisation. On Instagram and LinkedIn there is no advance designation: leave written instructions.
05
🔑
Solve the password knot
Without passwords, even the most motivated heir remains locked out. The safest solution: a password manager with an emergency access feature (Bitwarden, 1Password). As an alternative: a list of the main credentials in a sealed envelope held by a notary.
06
✍️
Write the instructions
Technology alone is not enough. Write a document (physical or encrypted digital) explaining where to find the access keys, what you want to be kept and what to be deleted, who handles what. You can integrate it into your traditional will.
🏛️ Who has digital-legacy tools active, by platform
Global estimates: the vast majority of users have not configured any tool
Users with Apple Legacy Contact active
≈ 5%
Users with Google Inactive Account Manager configured
≈ 4%
Users with a Facebook legacy contact set
≈ 7%
Users with no tool active
≈ 93%
📊
0%The Italian Notarial Council has been dealing with digital legacy since 2007, even before the App Store
🏛️
Did you know?
Millions of families keep their photographic memories exclusively on the remote-storage platforms of smartphone makers: no print, no physical support. On the death of the account holder, those images, in the absence of a recovery procedure activated while alive, may turn out to be inaccessible to the heirs or be deleted after a period of inactivity. A whole life of photographs is not an inheritable asset: it is a service one was subscribed to.
Further reading
🌐 Website
The Digital Beyond
thedigitalbeyond.com — the international reference on digital death
📄 Guide
Italy’s data protection authority — Digital legacy
garanteprivacy.it — guidance on platform policies (in Italian)
⚖️ Court ruling
Court of Milan, 10 February 2021
The ruling that opened the issue in Italy (Apple iCloud case)
B
✦ Section B
The big impacts and the urgent solutions
Three systemic chapters: the environmental, social, economic and political impact of the digital. Not individual actions, but collective pictures, to understand the context and choose which side to stand on.
The digital is not clean: it pollutes as much as global aviation
The emissions of the digital sector account for 4% of the global CO₂ total, and they are growing faster than those of any other sector.
4%
of global emissions of CO₂ come from the digital
The paradox of the digital is that it seems immaterial. Files weigh nothing, e-mails do not smoke, videos do not burn fuel. The digital sector as a whole today produces around 4% of global CO₂ emissions, more than world civil aviation. And, unlike aviation, it is growing exponentially.
The environmental footprint is spread across three levels: hardware production (the most impactful phase, with the extraction of rare minerals and the electronic manufacturing industry), the energy consumption of data centres (around 30% of digital emissions, and rapidly growing because of artificial intelligence), and the data-transmission network.
Data centres are becoming the new steel mills: huge energy consumers, often invisible to the public, often not powered by renewables.
Solutions exist, and some are already available today. Green hosting, frugal software design, right-to-repair policies, energy-efficiency standards: not just individual acts are needed, but infrastructures, regulations and a professional culture that turns the digital from a problem into part of the climate solution.
Framing
The problem in figures
Digital emissions4% global CO₂
Annual growth+6% every year
Hardware share57% of total
Data centre200 TWh / year globally
Three levels of intervention
👤
Individual: devices and habits
🏢
Organisational: CDR and tech choices
🏛
Political: regulation and standards
The Solutions
01
📏
Measure before acting
Tools like websitecarbon.com, mlco2.github.io, and digital-footprint calculators let you quantify the real impact. You do not improve what you do not measure.
02
🌱
Choose green hosting and infrastructure
The Green Web Foundation certifies providers running on renewable energy. Migrating digital infrastructure to green hosting is one of the most impactful actions available.
03
🔧
Extend the life of devices
Every additional year of life of a device cuts its total impact. Repair, refurbish, wait before replacing.
04
💻
Promote Frugal Design
Lightweight software, optimised websites, data that is not stored needlessly: digital sobriety is a principle of professional design.
05
📢
Demand reporting from companies
As consumers and citizens we can demand that tech companies publish their energy data. Frameworks already exist, such as the European CSRD.
06
🎓
Spread the culture of digital sustainability
Sloweb proposes a digital education that includes environmental impact as a fundamental subject: not only security and privacy, but also the ecology of the digital.
🌍 Global sectoral CO₂ emissions, compared with the digital
Billion tonnes of CO₂eq / year, 2025 projections
World civil aviation
≈ 2.5 Gt
Digital sector (today)
≈ 2.8 Gt
Digital sector (2030 without interventions)
≈ 4.5 Gt
🌱
0The digital will overtake aviation if action is not taken now
🌿
Did you know?
The environmental impact of the digital is comparable to that of air transport, but it is far more invisible to the senses. Tackling the problem means acting on the sources (production, design, infrastructures), not only on individual behaviour. But individual behaviours, added together, build the culture that makes change possible.
Further reading
📖 Book
The Dark Cloud. How the Digital World Is Costing the Earth, Scribe Publications, 2023
Guillaume Pitron
🌐 Report
IEA Data Centres Report
International Energy Agency, annual data
🌱 Campaign
Digital Cleanup Day
Every year in March, a collective clean-up of the digital
Who labelled the images for the AI you use? Paid two dollars an hour
The social impact of the digital does not only concern those who suffer the biases of algorithms. It concerns those who built those systems in the shadows, and those who live immersed in them every day.
3.5
billion people use social media every day
Somewhere in Kenya, a young man looks at images all day long. Images of violence, of abuse, of content no one should see. He classifies them, labels them, approves or rejects them. For a dollar or two an hour. This labour, invisible, unrecognised, often traumatising, is the foundation on which the artificial intelligence systems we use every day operate.
But the social impact of the digital does not stop there. It concerns algorithmic hooking: platforms designed to maximise attention time using the same psychological techniques as slot machines. The biases of algorithms that discriminate in hiring, in bank loans, in criminal sentences. The digital divide that excludes the elderly, the poor, people with disabilities.
Social media is like a dark forest: if citizens keep using it without understanding the mechanisms of manipulation, they risk getting lost, and being lost.
Sloweb proposes a digital literacy that goes beyond knowing how to “use” a tool: understanding the mechanisms of persuasion, recognising patterns of manipulation, consciously choosing how much time one gives up to the algorithms. A choice, not a compulsive use.
Framing
The problem in figures
Global click workers> 5 million people
Average wage$1–3 USD / hour
Teenagers and social media+40% depression risk
EU digital divide37% adults without skills
Three dimensions of the problem
⛏
Invisible labour in AI
📱
Compulsive use and manipulative design
⚖️
Algorithmic bias and discrimination
The Solutions
01
🔍
Know the mechanisms of persuasion
Intermittent notifications, likes, infinite scroll: these are techniques derived from behavioural psychology. Naming them weakens them. Teach them to young people.
02
📵
Practise selective digital detox
There is no need to give it all up. Just choose: no phone during meals, morning without social, weekend without notifications. Small reclaimings of attention.
03
⚖️
Demand algorithmic transparency
The European Digital Services Act requires large platforms to explain their algorithms. Use this right: you can ask why a piece of content is shown to you.
04
🤝
Support fair labour in AI
Organisations like Turkopticon document the conditions of data-annotation workers. Demanding ethical labour standards from AI providers is a legitimate act of pressure.
05
🏫
Spread critical digital education
Sloweb works with schools to bring into the classroom not only “how to use” the digital, but “why it is built this way” and “who benefits from it”.
06
🛡
Protect minors online
Sloweb supports regulations that limit social-network use under the age of 16 and require platforms to provide active protections, not delegating everything to parents.
📱 Effects of intensive social media use on teenagers, international research
Percentage increase in risk compared with moderate use (<1h / day)
Sleep disturbance
+28%
Anxiety symptoms
+43%
Low self-esteem (girls)
+55%
Depressive symptoms (use >5h / day)
+66%
👁
0%source: Twenge et al., iGen Research, samples of 500k+ teenagers
💬
Did you know?
Online flight prices change according to your browsing history. Insurers in some countries use fitness trackers to calculate premiums. Your data does not describe who you are: it determines what is offered to you, and at what price, often without your knowing.
Further reading
🎬 Film
The Social Dilemma
Netflix, Jeff Orlowski, 2020
📖 Book
Atlas of AI
Kate Crawford, the invisible labour in AI
🌐 Website
turkopticon.net
The voice of mechanical-turk workers
══════════════════════════════════════════════════════ RICETTA 13, B3 IMPATTO ECONOMICO E POLITICO
══════════════════════════════════════════════════════
✦ Sloweb Recipes · The big impacts ✦
13
Section B · 3EconomyMonopolyDemocracy
Five companies control 90% of the remote infrastructure worldwide
The concentration of digital power is not a technical problem. It is a matter of democracy, sovereignty and global economic justice.
90%
of the world’s remote infrastructure in the hands of 5 companies
Amazon, Microsoft, Google, Alibaba, Salesforce. Five names control almost the entirety of the remote infrastructure on which the digital services of governments, hospitals, universities and businesses worldwide run. This concentration is not the result of free competition: it is the product of an economic model that rewards platform monopoly, where whoever arrives first builds lock-in networks that are hard to dismantle.
The impact on the economy is profound. Artificial intelligence is accelerating the replacement of routine jobs at unprecedented speed, in sectors that affect millions of people. Digital disinformation destabilises democratic processes worldwide. The concentration of data creates unprecedented power asymmetries between those who own the infrastructure and those who live inside it.
Europe is trying to assert digital sovereignty, not only as a technical question, but as a pillar of democracy. The GDPR was only the beginning.
Solutions require collective political action. But individual choices, too (which remote infrastructure to use, which platform to depend on, what software to adopt at work), are concrete political acts that contribute to building or dismantling these monopolies.
Framing
The problem in figures
Big 5 share~90% of the market
AI jobs (2030)−85 million estimated
Large tech corporations revenue (2024)> $1 trillion
Effective taxationoften < 5%
Three levels of response
🇪🇺
Regulation: DSA, DMA, AI Act
🏢
Organisational: open-source, sovereignty
👤
Individual: conscious choices
The Solutions
01
🇪🇺
Know your legal armour
GDPR, DSA, DMA, AI Act: Europe has built the most advanced regulatory framework in the world. Knowing what it protects is the first step to using it.
02
🌐
Support open-source software
Every euro spent on open-source software (LibreOffice, Nextcloud, Signal) goes to an ecosystem that nobody controls monopolistically. It is an economic vote.
03
🏛
Demand data sovereignty from public administration
Italian citizens’ data should not be hosted on non-European remote infrastructure without safeguards. Public administration must set the example, and we can demand it.
04
📢
Support independent digital journalism
Platform concentration threatens information pluralism. Subscribe, share, fund journalism that does not depend on Facebook’s algorithms.
05
🤝
Take part in digital activism
Sloweb, EDRi, Electronic Frontier Foundation: organisations that fight for a free, fair and democratic internet. Joining is a concrete political gesture.
06
🎓
Educate for digital citizenship
As Slow Food transformed Italians’ relationship with food, Sloweb works to transform the relationship with the digital: not passive consumers, but conscious citizens.
💼 Concentration of the global remote-infrastructure market, % share 2024
The players that control the digital infrastructure on which the world runs
Everyone else (thousands of providers)
~10%
Google Cloud + Alibaba + other Big players
~23%
Microsoft Azure
~23%
Amazon Web Services
~31%
💼
0%AWS alone controls more remote infrastructure than all the others combined
🌐
Did you know?
The data sovereignty is today a geopolitical topic of the first order. When an Italian municipality saves its data on Amazon servers in the United States, that data is subject to the American Patriot Act. Digital autonomy is not a technical matter: it is political autonomy.
Further reading
📖 Book
The Curse of Bigness
Tim Wu, the economic model of the digital
🌐 Organisation
edri.org
European Digital Rights, defence of digital rights
📄 Framework
EU AI Act 2024
The first global regulation on artificial intelligence
Thirteen recipes. A lighter world.
Ten individual actions, three systemic visions. The digital has become the problem it is because it grew without anyone asking us what we wanted. Changing it requires exactly what you have just done by reading: understanding.
The next step is doing. And then telling. As in the kitchen: the best recipes are passed on, and they are updated when better ingredients are found.
Want the complete recipes?Coming soon, the book Le Ricette di Sloweb by Mauro Munzi, with an introduction by Marco Pozzi and an afterword by Pietro Jarre. Forthcoming. Look for it in bookshops and online stores.