Five Practical Takeaways
- Digital activity carries a real carbon cost, but context matters. Data centres account for approximately 1–1.3% of global electricity use according to the International Energy Agency.
- Website efficiency often matters more than email volume. Poor optimisation increases cumulative energy demand at scale.
- Infrastructure design influences sustainability. Modern switches, Wi-Fi and smart power management reduce long-term energy waste.
- Uncontrolled data growth is a hidden issue. Long-term cloud storage expansion quietly increases energy use.
- CSR credibility comes from documented policy and measurable improvement, not marketing claims.
Summary
At UK Netcom, we understand that digital infrastructure is no longer invisible. The systems that keep businesses connected, data centres, fibre networks, switching equipment, cooling systems and end-user devices, all consume electricity. While the impact of a single email is small, the cumulative effect of digital activity across UK organisations is measurable.
As more businesses review their Corporate Social Responsibility (CSR) and ESG commitments, the sensible response isn’t to restrict technology. It’s to design, manage and optimise infrastructure responsibly, and to document those improvements clearly and proportionately.
Introduction
At UK Netcom, we spend a lot of time designing and maintaining the infrastructure that keeps businesses connected and also constantly assess our own systems for carbon reduction and the associated practices required on a regular basis to ensure this is optimised. We work with switches, wireless networks, cloud environments and connectivity every day, so we see firsthand that digital systems aren’t abstract. They’re physical. They run on hardware. And that hardware consumes energy.
Over the years, we’ve helped organisations modernise their networks and reduce reliance on paper-based processes, and that’s been a positive shift. Digital transformation has cut printing, postage and unnecessary travel across many sectors.
But digital does not mean carbon-free.
Every email travels through servers and routing infrastructure. Every website visit relies on hosting equipment running continuously. Every cloud file sits on storage hardware that must be powered and cooled around the clock.
When we speak to business leaders across the UK about sustainability, the response is often honest:
“I hadn’t really thought about digital having a footprint.”
That’s understandable. Digital activity feels invisible.
Which brings us to the more practical question:
How much impact does it actually have, and what should we realistically do about it?
Globally, digital infrastructure consumes a measurable share of electricity. According to the latest analysis from the International Energy Agency, data centres account for approximately 1–1.3% of global electricity consumption. Data transmission networks contribute a further ~1%.
That electricity powers:
- Cloud applications
- File storage systems
- Backup infrastructure
- Cooling systems
- Network routing equipment
Modern data centre efficiency has improved significantly over the past decade, particularly when measured using Power Usage Effectiveness (PUE). Hyperscale facilities now operate with industry-leading PUE ratings compared to legacy environments.
In the UK, electricity itself has become cleaner. The UK Government greenhouse gas statistics confirm a substantial reduction in grid carbon intensity, largely due to renewable generation growth.
That context is important. Digital infrastructure today is more energy-efficient and cleaner per kilowatt-hour than it was a decade ago. However, overall demand continues to grow through cloud adoption, AI workloads, video collaboration and streaming.
For most UK SMEs, digital operations are unlikely to be the largest emissions source. Heating, transport and supply chain activity typically exceed IT-related impact.
But digital sustainability still deserves sensible governance.
Where does digital energy use actually occur?
Here’s a practical breakdown.
| Digital Activity | What Uses Energy | Why It Matters |
| Sending emails | Data centres + network routing | Volume multiplies impact |
| Website visits | Hosting servers + user devices | Heavy sites increase processing time |
| Cloud storage | Always-on storage systems | Long-term retention drives ongoing demand |
| Video conferencing | High bandwidth transmission | Increased data intensity |
| Network infrastructure | Switches, routers, Wi-Fi APs | Continuous background power draw |
Most energy use relates to infrastructure, not just individual user behaviour.
Are emails really a sustainability issue, or are we focusing on the wrong thing?
Estimates around email emissions vary widely. Published figures range from approximately 0.3g to 10g CO₂e per email, depending on methodology, attachment size and how long the data is stored.
Multiply that across millions of emails and it becomes measurable.
In real-world UK environments, though, we rarely see email volume alone significantly alter an organisation’s overall emissions profile.
Where we do see impact is in:
- Large attachments stored indefinitely
- Duplicate cloud backups
- Poorly managed shared drives
- Legacy on-premise servers running inefficiently
If we want to make meaningful digital improvements, governance is more effective than restriction:
- Introduce clear data retention policies
- Encourage link-sharing rather than large attachments
- Archive or delete redundant storage
- Review backup duplication
That’s proportionate, defensible action, especially within a CSR framework.
What about websites, can poor design increase emissions?
Yes, and this is often overlooked.
Every website request triggers server processing. If a site is heavy, large images, autoplay video, excessive scripts, the server works harder and for longer. Multiply that by thousands of visits and the energy use increases accordingly.
Optimising a website improves:
- Load speed
- Accessibility
- User experience
- Energy efficiency
Performance and sustainability tend to align.
From a connectivity perspective, efficient network design reduces retransmissions and latency. We explored infrastructure considerations in our guide to enterprise connectivity for UK organisations, particularly around scalable network architecture.
Sustainability isn’t achieved by limiting digital use. It’s achieved through intelligent design & at UK Netcom we apply these practices within our own business.
Does our network infrastructure affect our environmental footprint?
Absolutely.
Legacy networking hardware typically operates at lower energy efficiency compared to modern energy-optimised enterprise equipment. Older switches and Wi-Fi access points often draw more power relative to throughput than current-generation hardware.
Modern infrastructure allows us to implement:
- Smarter power management
- Efficient Power over Ethernet allocation
- Reduced signal overlap
- Improved throughput per watt
For example, carefully designed wireless deployments reduce retransmissions and improve efficiency.
It’s rarely about turning systems off. It’s about deploying them properly and reviewing lifecycle upgrades in a structured way.
Increasingly, CSR assessors want to see that kind of informed infrastructure decision-making, not broad sustainability claims.
What practical steps can UK SMEs take today?
If you’re reviewing digital sustainability as part of a CSR or ESG process, here’s a sensible framework:
1. Conduct a Digital Infrastructure Review
- Assess equipment age
- Review server efficiency
- Evaluate cloud architecture
2. Formalise Data Governance
- Define retention periods
- Remove inactive user accounts
- Eliminate duplicate backups
3. Optimise Website Performance
- Compress media
- Remove unnecessary plug-ins
- Audit third-party scripts
4. Improve Internal Awareness
- Encourage responsible file sharing
- Reduce unnecessary broadcast emails
- Align IT policy with CSR commitments
5. Document Continuous Improvement
CSR and UK reporting frameworks, including areas aligned with Streamlined Energy and Carbon Reporting (SECR), expect evidence of monitoring and review. Our Insights section provides guidance that helps organisations structure these internal discussions.
Where infrastructure changes are required, following structured technical processes, as outlined on our Support page, ensures sustainability improvements do not compromise resilience or performance.
How should digital sustainability sit within a CSR application?
UK CSR and ESG frameworks typically look for:
- Awareness of environmental impact
- Formal policies
- Monitoring and review
- Evidence of continuous improvement
- Stakeholder engagement
They do not reward vague green marketing.
The strongest submissions we see include:
- Infrastructure audit summaries
- Lifecycle upgrade strategies
- Data governance documentation
- Staff awareness initiatives
- Annual review commitments
That demonstrates maturity and professional judgement.
Is “green IT” about cutting usage, or designing smarter systems?
In most UK environments, it’s about smarter systems.
Remote and hybrid working have reduced commuting-related emissions across many UK sectors since 2020, based on Office for National Statistics transport data. Digital tools have enabled that shift.
The objective isn’t to restrict digital usage. It’s to ensure:
- Infrastructure is modern and efficient
- Systems are appropriately scaled
- Data growth is governed
- Hosting choices are considered
- Reviews are documented
Well-designed enterprise connectivity supports operational performance and responsible energy use at the same time.
Conclusion
From our perspective, digital activity does increase our carbon footprint, but context and proportionality matter.
We don’t see emails as inherently wasteful. We don’t see websites as automatically inefficient. And we don’t believe cloud infrastructure is irresponsible by default.
What we do see, time and again, is that the determining factors are design, governance and lifecycle management.
When infrastructure is specified properly, when data is governed sensibly, and when systems are reviewed rather than ignored, digital operations can be both high-performing and responsible.
For UK organisations, the strongest position is one grounded in evidence and professional judgement:
- Understand where digital emissions arise
- Optimise systems intelligently
- Govern data responsibly
- Review infrastructure regularly
That’s what demonstrates credibility, not broad sustainability claims, but informed decisions backed by documentation.
If you’re reviewing connectivity, infrastructure or cloud design as part of a CSR or ESG process, we’re always happy to have a practical, measured conversation about what’s meaningful, and what genuinely moves the dial. Contact us here.
FAQs
Does moving entirely to cloud services automatically reduce emissions?
Not necessarily. Hyperscale cloud providers typically operate highly efficient data centres with strong PUE ratings, but poorly governed storage or duplicated backups can still increase overall demand.
Are renewable-powered Data-Centres completely carbon neutral?
They significantly reduce operational emissions, but full lifecycle impact includes hardware manufacturing, construction and network infrastructure.
Should digital emissions be included in Scope 3 reporting?
Depending on your reporting framework, purchased cloud services and hosted infrastructure may fall under Scope 3 categories and should be reviewed carefully.
Is upgrading network hardware purely for sustainability financially viable?
The primary business case is usually performance, resilience and lifecycle support. Energy efficiency becomes an additional long-term benefit.
Does website optimisation meaningfully influence ESG scoring?
It can contribute positively, particularly when documented as part of broader digital governance, performance improvement and structured environmental review processes.