The Internet powers modern society, enabling communication, commerce, and innovation on a global scale. However, its rapid growth raises significant environmental concerns, including high energy consumption, resource depletion, and carbon emissions. Technical bodies like the Internet Engineering Task Force (IETF) and the Internet Research Task Force (IRTF) are stepping up to address these challenges. By integrating sustainability into protocol design, research agendas, and operational practices, these organizations aim to reduce the Internet’s ecological footprint while enhancing its role in supporting global sustainability goals.
The Growing Environmental Challenge of Internet Infrastructure
Internet infrastructure, from data centers to undersea cables, consumes vast amounts of electricity and materials. Data centers alone account for about 1-1.5% of global electricity use, a figure projected to rise with the explosion of AI, streaming, and IoT devices. Network equipment manufacturing involves mining rare earth metals, contributing to embodied carbon emissions that can rival operational ones for smaller devices.
Key issues include:
- Energy Intensity: Routers and switches often run at full power regardless of load, lacking proportionality.
- Carbon Sources: Power grids vary in cleanliness; fossil fuel-dependent regions amplify emissions.
- Waste Generation: Frequent hardware upgrades lead to e-waste landfills.
- Travel Emissions: In-person meetings for standards development add to the carbon tally.
These factors underscore the need for the Internet community to rethink design principles. The IETF and IRTF are at the forefront, fostering discussions that balance performance with planetary health.
IRTF’s SUSTAIN Research Group: A Beacon for Sustainable Networking
The IRTF launched the Sustainability and the Internet (SUSTAIN) Research Group to tackle these issues systematically. Unlike advocacy groups, SUSTAIN focuses on technical research into the Internet’s environmental impacts—its ‘footprint’—while highlighting its positive contributions, or ‘handprint,’ such as enabling remote work and smart grids.
SUSTAIN adopts a holistic approach:
| Focus Area | Key Activities |
|---|---|
| Footprint Analysis | Measuring energy, water, and material use across network lifecycles. |
| Handprint Exploration | Studying Internet-enabled sustainability solutions like precision agriculture. |
| Multidisciplinary Integration | Collaborating with environmental scientists and economists. |
| Policy Insights | Identifying architectural changes for standards bodies. |
The group convenes hybrid meetings to minimize travel emissions and invites experts for talks on metrics and strategies. Outputs include research papers and informational RFCs that inform IETF work without dictating standards.
IETF’s Push Towards Carbon-Aware Networking
The IETF, responsible for core Internet protocols, is embedding sustainability into its processes. Recent efforts include analyzing meeting carbon footprints, where air travel dominates 99% of emissions. Virtual and hybrid formats have slashed energy use by up to 66% compared to in-person events.
Emerging concepts like carbon-aware routing direct traffic to lower-emission paths, potentially incentivizing greener infrastructure investments. For instance, operators could prioritize ‘green’ links, creating market pressure for renewable energy adoption. Additionally, protocols are being designed for better power proportionality, ensuring idle devices consume minimal energy.
Beyond Energy: Tackling Embodied Emissions and Resource Use
Sustainability extends beyond operations to the full lifecycle. Embodied emissions from manufacturing often exceed usage-phase impacts for edge devices. IRTF research explores prolonging hardware life through software upgrades and reducing over-provisioning.
- Modular designs allow component swaps without full replacements.
- AI-optimized traffic management cuts unnecessary hardware deployments.
- Standardized metrics for recyclability guide procurement.
The 2022 IAB E-Impact Workshop highlighted these interdependencies, calling for lifecycle assessments in protocol evaluations.
Operational Sustainability: Lessons from IETF Practices
IETF’s net-zero updates demonstrate practical steps. In 2025, they tracked emissions meticulously, offsetting unavoidable ones and shifting to low-carbon venues. These changes serve as a model for the broader community, proving high-quality collaboration without excessive travel.
Hybrid participation has boosted inclusivity, drawing diverse contributors while cutting costs and emissions.
The Internet’s Dual Role: Footprint vs. Handprint
While mitigating negatives, the Internet drives positives. Telemedicine reduces patient travel; smart sensors optimize energy in buildings. SUSTAIN quantifies these to guide investments. Aligning with UN SDGs, efforts target climate action (SDG 13) and sustainable industry (SDG 9).
Future Directions and Challenges
Ahead lie standardized sustainability metrics, regulatory alignments, and cross-sector collaborations. Challenges include data gaps on full footprints and resistance to efficiency trade-offs. Yet, with IETF/IRTF leadership, the Internet can evolve into a net-positive force.
Frequently Asked Questions
What is the SUSTAIN RG?
The IRTF’s SUSTAIN Research Group studies Internet sustainability, focusing on environmental impacts and benefits through research, not standards.
How does carbon-aware networking work?
It routes data via low-carbon paths, leveraging grid variations to reduce overall emissions.
Has the IETF reduced its emissions?
Yes, hybrid meetings and offsets have significantly lowered their footprint, as detailed in annual updates.
What about e-waste from networks?
Initiatives promote longer hardware lifecycles and recyclable designs to minimize landfill waste.
Can the Internet help fight climate change?
Absolutely, through its handprint: enabling renewables monitoring, disaster response, and efficient resource use.
References
- IRTF Sustainability and the Internet Proposed Research Group — IRTF. 2026. https://www.irtf.org/sustain.html
- Challenges and Opportunities in Management for Green Networking — IETF. 2023. https://www.ietf.org/archive/id/draft-irtf-nmrg-green-ps-03.html
- A Sustainable Internet: How to get there from here? — IETF Blog. 2026. https://www.ietf.org/blog/sustain-rg/
- Net zero update for 2025 — IETF Blog. 2025. https://www.ietf.org/blog/net-zero-update-2025/
- Impressions from the Internet Architecture Board E-Impact Workshop — IETF Blog. 2023. https://www.ietf.org/blog/impressions-e-impact-workshop/