Sustainable IT is the practice of reducing the environmental impact of an organization’s technology across its whole life cycle: how equipment is bought, how much energy data centers, cloud services and devices use, how long hardware is kept and how it is retired. It also covers measuring and reporting that impact, which customers, investors and in some places regulators increasingly ask for. The older term green IT is often used to mean the same thing, though sometimes more narrowly for energy efficiency and e-waste.
At a glance
- Sustainable IT covers energy use, hardware life cycles, cloud and data center choices, disposal and reporting.
- Data center efficiency is often tracked with power usage effectiveness (PUE); emissions use broader greenhouse gas accounting methods.
- Hardware manufacturing can account for a large share of a device’s lifetime footprint, so keeping devices longer can matter as much as using less power.
- Cloud and colocation providers differ in efficiency, energy sourcing and the data they share.
- Many sustainable IT actions also cut cost, such as removing idle servers and extending device life.
What problem it solves
Technology uses a lot of electricity and hardware. Servers, storage and networking in data centers run around the clock; laptops and phones are replaced on regular cycles; and retired equipment often contains materials that need careful handling. As organizations set climate targets or face questions from customers and investors, IT is a visible part of the footprint, but one that is often hard to measure.
Sustainable IT gives that effort a structure. It identifies where technology’s impact comes from, sets practical targets and changes buying, operating and disposal habits to reduce it. It also helps IT supply the data that sustainability reports need, rather than estimating after the fact.
How it works
Measure. Build a baseline: energy use in owned facilities, emissions data from colocation and cloud providers, device counts and ages, and how retired equipment is handled. Expect gaps, especially for cloud and supply chain data.
Facilities and infrastructure. Improve data center efficiency through better cooling, higher utilization and consolidation. Newer approaches such as liquid cooling can help with dense hardware. Some organizations move workloads to colocation or cloud facilities with better efficiency or cleaner energy, or buy energy through arrangements such as energy as a service (EaaS).
Cloud use. Rightsize and switch off unused resources, choose regions with cleaner energy where latency and residency allow, and use provider emissions reports. These steps overlap closely with FinOps cost work.
Hardware life cycle. Extend the hardware refresh cycle where performance and support allow, buy refurbished or more efficient equipment, and manage devices through device lifecycle management (DLM).
Disposal. Use certified IT asset disposition (ITAD) providers that securely wipe data and reuse, resell or recycle equipment, with documentation for reporting.
Procurement and reporting. Add sustainability criteria to purchasing and vendor reviews, and feed IT data into company-wide sustainability reporting.
When it matters for buyers
- When customers or investors ask for emissions data. Large customers increasingly include supplier sustainability in their reviews.
- When choosing a data center, colocation or cloud provider. Efficiency, energy sourcing and reporting quality differ.
- When planning a hardware refresh. Extending life, buying refurbished and responsible disposal all change the footprint and the cost.
- When energy costs rise. Efficiency work often pays for itself.
- When reporting rules apply to you. Requirements vary by jurisdiction and company type; check with your sustainability or legal team.
For facilities that publish efficiency and energy data, see our colocation solutions overview.
Questions to ask vendors
- What is your facility’s power usage effectiveness, how is it measured, and over what period?
- What share of your energy comes from renewable or low-carbon sources, and how is that claimed?
- What emissions data can you provide for our usage, and which methodology does it follow?
- For hardware, what is the expected lifespan, repairability and take-back or recycling program?
- For disposal, which certifications do you hold, and what documentation do we receive?
- How can we reduce our footprint within your service, for example through region choice or rightsizing?
How it differs from power usage effectiveness
Power usage effectiveness (PUE) is a single metric for data center facility efficiency: total facility energy divided by the energy used by IT equipment. It says nothing about where the energy comes from, how efficiently the servers themselves are used or the impact of manufacturing and disposing of hardware. Sustainable IT is the broader practice that covers all of those, using PUE as one input among several.