Green computing is the design, manufacture, use, and disposal of computers and related digital systems in ways that reduce environmental harm. It includes improving energy efficiency, extending device lifespans, using resources responsibly, and reducing electronic waste.
In IB Digital Society, green computing belongs to the environmental context, particularly pollution and waste. It connects technical choices about computers, networks, and data centres to their impacts and implications for people, communities, and ecosystems. This topic is shared by SL and HL students.
Green computing considers the entire life cycle of a digital system:
| Stage | Green computing approach | Environmental significance |
|---|---|---|
| Design and manufacture | Use fewer scarce materials and design devices for repair | Reduces resource extraction and manufacturing waste |
| Operation | Use energy-efficient processors, cooling systems, and power settings | Lowers electricity consumption and associated emissions |
| Continued use | Repair, upgrade, share, or refurbish devices | Extends product life and delays replacement |
| End of life | Reuse components and recycle e-waste responsibly | Reduces landfill waste and hazardous pollution |
A key impact is reduced energy or material consumption when efficient systems and repair programmes are adopted. An implication is the future opportunity to make digital systems more sustainable, alongside the risk that efficiency gains encourage greater overall consumption. This is sometimes called a rebound effect.
A common misconception is that green computing means only switching off computers. Power management matters, but green computing also concerns supply chains, planned obsolescence, repairability, data-centre operation, and e-waste disposal. It therefore involves systems thinking because environmental outcomes result from interconnected decisions by manufacturers, users, governments, recyclers, and energy providers.
For an IB exam response, do not merely define the term. Explain a method, connect it to a specific environmental impact or implication, and identify affected people and communities. For an evaluate question, weigh benefits against limitations such as cost, unequal access to repair, rebound effects, or misleading environmental claims.
