Green IT reduces the environmental impact of computing itself, while climate tech uses technology to reduce greenhouse-gas emissions or help society adapt to climate change. A more efficient data centre is green IT. A flood-warning system, low-carbon cement process or grid-scale battery is climate tech. See the broader sustainable-tech topic guide for the surrounding concepts.
The categories overlap. Software that shifts computing to cleaner hours can make IT more sustainable and support climate goals. The difference is mainly the problem being solved: green IT starts with technology’s own footprint; climate tech starts with mitigation or adaptation across the wider economy.
Green IT vs climate tech at a glance
| Green IT | Climate tech | |
|---|---|---|
| Main goal | Reduce the environmental impact of digital technology | Mitigate climate change or support adaptation |
| Typical scope | Devices, software, networks, cloud services and data centres | Energy, transport, buildings, industry, food, land and climate resilience |
| Common measures | Energy, carbon, water, materials, waste and equipment life | Emissions avoided or removed, resilience and system-level outcomes |
| Example | Extending laptop life through repair and reuse | A heat-pump system replacing fossil-fuel heating |
| Who works on it | IT teams, developers, cloud architects, procurement and suppliers | Scientists, engineers, founders, policymakers, investors and sector specialists |
What is green IT?
Green IT, also called sustainable IT or sustainable ICT, is the practice of reducing the environmental and social impacts associated with information technology. It considers the full lifecycle: extracting materials, manufacturing devices, operating digital services, maintaining equipment, reusing it and managing its end of life.
The UK’s Defra Digital Sustainability Strategy 2025 to 2030 describes sustainable IT as an approach spanning procurement, performance reporting, infrastructure and supply chains. That breadth matters: electricity use is only one part of the footprint.
Examples of green IT
- Keeping laptops and phones in productive use for longer
- Buying repairable equipment and reusing it before recycling
- Removing idle servers and unnecessary cloud resources
- Matching computing capacity to actual demand
- Designing software that uses less processing, storage and data transfer
- Scheduling flexible workloads when lower-carbon electricity is available
- Measuring supplier, manufacturing, energy, water and waste impacts
Green software is one part of green IT. The Green Software Foundation’s 2026 working definition includes software and its hardware, with attention to carbon, energy, water and waste across the technology stack. Our guide to green software principles and examples goes deeper into that discipline.
What is climate tech?
Climate tech is technology intended to reduce the causes of climate change or manage its effects. It includes both mitigation, which limits emissions or removes greenhouse gases, and adaptation, which helps people, infrastructure and ecosystems cope with climate impacts.
The field extends far beyond computing. The UN climate process uses a Technology Mechanism to support the development and transfer of technologies for mitigation and adaptation.
Examples of climate tech
- Renewable electricity and energy storage
- Heat pumps and energy-efficient buildings
- Low-carbon steel, cement and industrial processes
- Electric transport and charging systems
- Methane detection and emissions monitoring
- Climate-resilient crops and water systems
- Flood, fire and extreme-weather forecasting
- Carbon removal and long-term storage
Software and data can support many of these systems, but using software does not automatically make a product climate tech. A normal accounting application running in the cloud is digital technology. An application that helps an electricity network balance variable renewable power may be part of a climate-tech solution.
The five main differences
1. Green IT starts with computing’s footprint
Green IT asks how an organisation can provide digital services with fewer environmental harms. The object being improved is the IT estate or digital service itself.
2. Climate tech starts with a climate outcome
Climate tech begins with a mitigation or adaptation problem. The solution might use software, biotechnology, new materials, mechanical engineering or a combination of disciplines.
3. They use different boundaries
A green IT project might measure a fleet of laptops, a data centre or one online service. A climate-tech assessment may need to compare an entire energy, transport or manufacturing system against what would otherwise happen.
4. They require different expertise
Green IT often involves software developers, cloud and infrastructure engineers, asset managers and technology procurement. Climate tech may also require chemists, agricultural scientists, civil engineers, policy specialists and many other sector experts. Explore the major areas in our guide to climate-tech fields.
5. Their claims need different evidence
A green IT team might track equipment life, energy use, embodied emissions, utilisation, water or e-waste. A climate-tech company needs to show that its proposed climate outcome is additional, durable and meaningful at the relevant system boundary. In both cases, a vague “green” label is not enough.
Where green IT and climate tech overlap
The cleanest overlap occurs when digital technology both reduces its own footprint and contributes to a wider climate outcome. Examples include:
- A lightweight grid-forecasting service that helps integrate renewable energy
- Sensors that detect methane leaks while minimising hardware and data demands
- A building-control system that reduces heating demand and runs efficiently
- Climate models operated on well-utilised infrastructure with transparent energy reporting
There can also be tension. A climate application may require intensive computing or large quantities of new hardware. Its operators should still manage those impacts. Conversely, an efficient digital service is not automatically climate tech if it does not address mitigation or adaptation.
Green IT, green tech, cleantech and climate tech
| Term | Useful working definition |
|---|---|
| Green IT | Reducing impacts from information technology and digital services |
| Green tech | A broad informal label for technologies with environmental benefits |
| Cleantech | Technologies and business models that reduce pollution or resource use, often in energy and industry |
| Climate tech | Technologies focused specifically on climate mitigation or adaptation |
| Green software | Software and its supporting hardware designed and operated to reduce carbon, energy, water and waste |
These are working categories, not protected labels. Organisations use them differently. When assessing a course, job, product or investment, look past the label and ask what problem it addresses, what boundary it uses and how the result is measured.
Which field should you study or work in?
Choose green IT if you want to improve software, cloud services, devices, data centres, procurement or digital operations. It is a natural extension for developers and IT professionals.
Choose climate tech if you want to solve a mitigation or adaptation problem in energy, transport, buildings, food, industry or resilience. Start with the problem area, because climate knowledge alone does not replace sector expertise.
If you are interested in physical products, repairability, materials and circular systems, consider sustainable product design careers. The boundaries between these fields are porous, and many useful roles connect more than one.
How organisations can use the distinction
- Manage the footprint of your own technology. Include hardware, software, suppliers and end of life.
- Define the climate outcome separately. State whether a product supports mitigation, adaptation or both.
- Avoid double counting. An efficient cloud service and the climate solution running on it are related but not identical claims.
- Compare against a credible baseline. Explain what would happen without the intervention.
- Report trade-offs. Include new hardware, rebound effects, water use and uncertainty where material.
This distinction is especially important for AI. A model might support climate research while still consuming substantial electricity and water. Our evidence-based guide asks how much energy AI uses without assuming that every use has the same footprint.
Frequently asked questions
Is green computing the same as green IT?
The terms are often used interchangeably. Green computing sometimes emphasises computing systems and their operation, while green IT can include procurement, people, governance, supply chains and end-of-life management.
Is renewable energy climate tech?
Renewable-energy generation, storage and supporting systems are commonly included in climate tech because they can displace fossil-fuel emissions. The climate result still depends on deployment and the system being changed.
Can a company be both green IT and climate tech?
Yes. A company can manage the footprint of its digital operations through green IT while selling a product that supports climate mitigation or adaptation.
Which field is broader?
Climate tech spans many economic sectors, while green IT concentrates on digital technology. Green tech is usually the broadest and least precise label of the group.