Data representation and security · GCSE Computer Science

Environmental impact of computing

GCSE Computer Science environmental impact: e-waste, energy use, rare earths, cloud data centres, and sustainable practice.

UNDERSTAND→RETRIEVE→REMEMBER
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THE MEMORY HOOK
Every click runs on coal somewhere — manufacture, use, dispose: three carbon stories.

The important bits

What you need to know

  1. 1

    Lifecycle: manufacture (mining, fabs), use (electricity, cooling), disposal (e-waste).

  2. 2

    Data centres: huge 24/7 power, cooling water, often fossil-heavy grids; demand rises with streaming and AI.

  3. 3

    E-waste: toxic metals, short upgrade cycles, export to LICs for informal recycling — health and pollution.

  4. 4

    Rare earth elements in phones, magnets, batteries — limited supply, mining damage.

  5. 5

    Energy efficiency: newer CPUs, virtualisation, turning off devices, algorithm efficiency (less compute).

  6. 6

    Green software: optimise code, delete unused data, darker UI saves OLED power marginally.

  7. 7

    Circular economy: repair, recycle, legislate WEEE; right to repair debates.

  8. 8

    Ethical response: legislation, corporate targets, user choices — evaluate trade-offs.

Examples worth remembering

Short evidence. Real method.

“The cloud is someone else’s computer in a building that never sleeps.”
Data centre teaching metaphor

Moves environmental question from personal device to infrastructure scale.

Go deeper

Three-stage evaluation

Manufacture (one-off footprint), lifetime use (kWh), end of life (recycling). 6-mark answer touches all three with example.

WORKED EXAMPLE

See the idea in action

Question: environmental impact of smartphones. Manufacture: mining, assembly energy. Use: daily charging, network. Disposal: e-waste if not recycled. Mitigations: longer use, certified recycling, efficient data centres.

Exam technique

Turn knowledge into marks

Name e-waste and data centres — examiners expect both device and cloud.

Common mistakes

Do not give these marks away

  1. 01

    Only “turn off light” with no manufacture/disposal.

  2. 02

    Cloud as weightless and green by default.

  3. 03

    Ignoring global inequality in e-waste dumping.

QUICK RETRIEVAL

What is e-waste?

ADiscarded electronic equipment

BExtra email spam

CA type of virus

DFaster SSD storage

Show the answer

Discarded electronic equipment. Phones, PCs, servers thrown away — toxic and resource-heavy.

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Quick questions

If this is the bit you searched

Do data centres affect climate?

They consume large electricity; footprint depends on grid mix and efficiency.