The ICT sector is responsible for approximately 2-4% of global greenhouse gas emissions, comparable to the aviation industry. Data centres alone consume around 1% of global electricity. As digital services grow, so does their energy footprint. Yet most organisations have no visibility into the energy consumption of their software, treating it as an externality that someone else manages.
The energy consumed by your software is not just an environmental concern. It is a direct cost. Cloud providers charge for compute time, and compute time is a proxy for energy consumption. An application that uses twice the CPU cycles costs twice as much to run. An inefficient database query that runs millions of times per day consumes energy that appears on your AWS bill as EC2 or RDS charges. Energy efficiency and cost efficiency are the same objective.
Data centres now consume more electricity than many countries. Every software optimisation contributes to changing that trajectory.
Regulatory pressure is increasing. The EU's Corporate Sustainability Reporting Directive (CSRD) requires large companies to report on their environmental impact, including Scope 3 emissions that cover the software and services they consume. The UK is developing similar frameworks. Organisations that can measure and report their software energy consumption will have a competitive advantage in procurement processes that increasingly weight sustainability criteria.
The Business Case
Beyond compliance, there is growing customer demand for sustainable digital services. Government procurement frameworks now include sustainability scoring. Enterprise buyers are asking vendors to demonstrate their environmental commitments. Being able to quantify the energy efficiency of your software, and show that you actively manage it, differentiates you from competitors who treat sustainability as a marketing exercise rather than an engineering discipline.
- ICT accounts for 2-4% of global greenhouse gas emissions and growing
- Cloud computing costs are a direct proxy for energy consumption
- CSRD and UK sustainability reporting will require software energy disclosure
- Government procurement increasingly weights sustainability criteria
- Energy-efficient code is faster, cheaper, and more maintainable
The practical benefits extend to development teams as well. A focus on energy efficiency drives better engineering practices: smaller payloads, fewer redundant operations, more efficient algorithms, and cleaner architecture. Teams that adopt energy-aware development consistently report improvements in application performance, hosting costs, and code quality. The environmental benefit is real, but it is the business benefits that sustain the practice.
