O Level Geography: Economic Development — Revision Notes

Condensed for the final weeks. For the full explanation, use the Economic Development study guide.

The seven subtopics, all needing a named case study

Subtopic	Case study required
3.1 Development	A transnational corporation and its global links
3.2 Food production	A farm/agricultural system; a food-shortage country/region
3.3 Industry	An industrial zone or factory
3.4 Tourism	An area where tourism is important
3.5 Energy	Energy supply in a country/area
3.6 Water	Water supply in a country/area
3.7 Environmental risks	An area with environmental risk from development

One case study can support more than one subtopic if it genuinely fits (e.g. the same transnational corporation for 3.1 and 3.3) — but each still needs concrete, place-specific facts, not a vague example.

3.1 Development — indicators and sectors

Indicator type	Example
Economic	GNP per capita
Social	Literacy rate, life expectancy
Composite	HDI (avoids single-indicator distortion)

Sectors shift with development: primary (extraction) → secondary (manufacturing) → tertiary/quaternary (services, research/information) — explain the shift, don’t just recall the diagram. Globalisation: weigh positives (investment, jobs) against negatives (loss of local control, environmental cost).

3.2–3.3 Food production and industry — same systems approach

Both use inputs → processes → outputs (industry’s outputs include waste). For farming: natural inputs (relief, climate, soil) + human inputs (economic, social) determine commercial/subsistence, arable/pastoral/mixed, intensive/extensive classification.

Food shortage causes: natural (drought, floods, storms, pests) vs economic/political (low investment, poor transport, conflict).

Industry location factors: land, labour, raw materials, fuel and power, transport, markets, political factors.

3.4–3.6 Tourism, energy, water

Theme	Structure
Tourism	Growth (physical/human attractions) → impact (benefits vs disadvantages) → management (sustainability)
Energy	Non-renewable, renewable, nuclear, fuelwood — evaluate nuclear and renewable specifically
Water	Supply methods (reservoirs/dams, wells/boreholes, desalination); use split (agriculture/domestic/industrial) shifts with development

Energy and tourism are the two subtopics singled out for evaluation, not just description — always weigh both sides.

3.7 Environmental risks — the theme’s synthesis

Named threats: soil erosion, desertification, enhanced global warming, pollution (water, air, noise, visual). This subtopic is most often examined by linking back to an earlier process (e.g. industry’s waste output, or energy’s fossil-fuel use) — revise it as a synthesis, not a standalone list.

Worked example: evaluating an energy source

A question asks you to evaluate a country’s decision to expand nuclear power generation.

Benefit:     Low ongoing carbon emissions once built, and a
             reliable, high-output power source not dependent on
             weather conditions (unlike wind or solar).
Drawback:    Very high upfront construction cost and long build
             time, plus the unresolved long-term problem of
             radioactive waste disposal and the (low-probability
             but high-impact) risk of a serious accident.
Balanced
conclusion:  Nuclear power can be a genuine solution to rising
             energy demand with lower emissions than fossil fuels,
             but the decision depends heavily on a country's ability
             to fund the high upfront cost and manage waste safely
             over the long term -- exactly the kind of weighed
             judgement an "evaluate" command word is asking for,
             rather than a one-sided list of advantages.

The same weighed structure – a genuine benefit, a genuine drawback, then a conclusion that depends on context – transfers directly to tourism evaluation questions too.

Exam traps

• Having only a vague, generic case-study example rather than real, place-specific facts you can write under exam conditions.
• Reciting the primary→secondary→tertiary sector shift as a diagram without explaining why it happens as development proceeds.
• Describing energy or tourism content one-sidedly when the command word asks for evaluation.
• Treating food production and industry as unrelated to each other, rather than recognising both use the same inputs-processes-outputs structure.
• Forgetting environmental risks (3.7) connects back to processes covered earlier in the theme, rather than being a standalone list of named threats.

Case study reuse: a practical revision shortcut

Given six of the seven subtopics demand a named case study, it is far more efficient to deeply learn 3-4 well-chosen examples that each span multiple subtopics than to memorise seven completely separate, shallow examples. A single large transnational corporation, for instance, can typically supply concrete detail for 3.1 (global links), 3.3 (industrial location factors) and potentially 3.7 (environmental risk from its operations) if you learn its specific facts – named locations, named products, specific employment or investment figures – in enough depth to answer any of those three subtopics’ questions convincingly.

Self-test

1. Which subtopics are singled out for evaluation rather than description alone?
2. Name the four production sectors in order of typical development progression.
3. What structure do both food production and industry share?
4. Name the four environmental risks specified in 3.7.
5. Why might the same case study be usable for more than one subtopic?

Answers: 1. Energy and tourism. 2. Primary, secondary, tertiary, quaternary. 3. Inputs, processes and outputs (industry’s outputs additionally include waste). 4. Soil erosion, desertification, enhanced global warming, pollution (water, air, noise, visual). 5. Because a single real-world example, such as a transnational corporation, can genuinely illustrate more than one subtopic’s content (e.g. both development’s global links and industry’s location factors), provided it is supported with concrete, place-specific detail relevant to each.