Why is "Assuming renewable energy has no environmental impact" a common mistake in Energy Impacts, Sustainability and Case Studies?

Why it happens: Marketing emphasises positives. How to avoid it: Hydro displaces communities; wind affects birds; solar manufacturing has footprint. Trade-offs exist. Source: 0460 Examiner Reports 2022-2024

Why is "Assuming technology alone will solve energy challenges" a common mistake in Energy Impacts, Sustainability and Case Studies?

Why it happens: Tech-optimism narrative. How to avoid it: Demand-side efficiency, behaviour change, policy all matter as much as new tech. Source: 0460 Examiner Reports 2022-2024

Resource ProvisionCambridge IGCSE Geography 0460

Energy Impacts, Sustainability and Case Studies

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Energy Impacts, Sustainability and Case Studies Study Notes — Cambridge IGCSE Geography 0460 (2024-2026 syllabus)

Environmental and social impacts. Three Gorges Dam. Germany's Energiewende. Costa Rica. Sustainable futures.

What you’ll learn

Mapped to the Cambridge IGCSE 0460 syllabus (2024-2026).

10.6.1 — Describe environmental impacts of energy.
10.6.2 — Evaluate Three Gorges case study.
10.6.3 — Identify sustainable energy strategies.

Environmental impacts

Climate + air + acid rain + habitat.

Climate change. CO₂ + methane trap heat. Global temperature ~1.2°C above pre-industrial. Most CO₂ from fossil fuels.

Air pollution. SO₂, NO₂, PM2.5 from combustion. Smog, asthma, lung disease. WHO links to ~7 million premature deaths/year.

Acid rain. SO₂ + water → acid. Damages forests, lakes, buildings. Curbed in OECD by clean-air legislation; still serious in China and India.

Habitat damage. Mining strips landscapes. Oil spills (Deepwater Horizon, Niger Delta). Fracking, tar sands extraction devastate large areas.

Nuclear waste. Radioactive for thousands of years. Storage challenge.

Cambridge tip. Mark scheme rewards multiple impacts with specific examples.

Climate change.
Air pollution.
Acid rain.
Habitat damage.

See the full worked example for energy impacts, sustainability and case studies →

Three Gorges Dam case study

World's largest hydroelectric station.

Project. Yangtze River, China. Completed 2012. ~22,500 MW capacity. World's largest hydro power station.

Benefits.

Renewable electricity — supplies ~3% of China's electricity demand.
Flood control on lower Yangtze; protects ~15M people downstream.
Improved navigation — large ships reach inland Chongqing.

Costs.

Displacement — ~1.3 million people relocated.
Ecosystem damage — Yangtze finless porpoise endangered. Sediment trapped behind dam reduces fertility downstream.
Cultural heritage — ancient sites flooded.
Earthquake risk — reservoir water weight may increase seismic activity.

Three Gorges delivers vast renewable power and flood control — but at heavy social and ecological cost.

Verdict. Mixed. Large-scale renewable power AND major social/ecological costs. Cambridge mark schemes reward BALANCED evaluation.

Power + flood control + navigation.
Displacement + ecology + heritage.
Balanced verdict scores top band.

See the full worked example for energy impacts, sustainability and case studies →

Sustainable energy strategies

Efficiency + renewables + storage.

Efficiency. Insulation, LEDs, public transport, electric vehicles, smart appliances. CUTS demand — cheapest way to reduce emissions.

Renewable rollout. Solar farms, wind farms, hydro, geothermal. Replaces fossil fuels.

Storage and grids. Batteries store solar/wind for night use. Smart grids balance supply and demand. Interconnectors (Norway-UK undersea cable).

Decentralisation. Rooftop solar; community wind; reduces transmission losses.

Country examples.

Costa Rica — ~99% renewable electricity (hydro + geothermal + wind).
Germany — Energiewende — phasing out nuclear and coal; renewables ~50% of electricity.
Iceland — geothermal + hydro = ~100% renewable electricity.
Denmark — ~50% wind.

Cambridge tip. Quote SPECIFIC % renewable for named countries.

Efficiency + renewables + storage.
Costa Rica, Germany, Iceland examples.
Combined strategies needed.

See the full worked example for energy impacts, sustainability and case studies →

How it’s examined

Energy case studies common on Paper 2. Most-tested: impacts (8 marks), Three Gorges (8 marks), sustainable strategies (6 marks).

Sources: Cambridge IGCSE Geography 0460 syllabus (2024-2026); 0460 Examiner Reports 2022-2024; 0460/22 Oct/Nov 2024 question paper and mark scheme. Last reviewed 2026-05-10.

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Worked examples, formulae, definitions and the mistakes examiners flag — everything you need to push from a pass to an A*.

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Step-by-step worked examples — Energy Impacts, Sustainability and Case Studies

Step-by-step solutions to past-paper-style questions on energy impacts, sustainability and case studies, written exactly the way a tutor would explain them at the board.

1Environmental impacts of energy (8 marks)
Extended• Adapted from 0460/22 Oct/Nov 2024• energy impacts
Question
Explain FOUR environmental impacts of fossil fuel use. (8 marks)
Step-by-step solution
1. Step 1
  Climate change (2 marks). CO₂ traps heat; global temperature ~1.2°C above pre-industrial.
2. Step 2
  Air pollution (2 marks). SO₂ + NO₂ + PM2.5 from burning fuel → smog, asthma, lung disease. Major urban problem.
3. Step 3
  Acid rain (2 marks). SO₂ + water → acid precipitation. Damages forests, lakes, buildings. Reduced in OECD by clean-air legislation; still widespread in China/India.
4. Step 4
  Habitat damage (2 marks). Mining strips landscapes; oil spills (Deepwater Horizon, Niger Delta); fracking and tar sands devastate land.
Answer
Climate change + air pollution + acid rain + habitat damage. All from fossil fuel use.
2Three Gorges Dam case study (8 marks)
Extended• case study
Question
Evaluate the Three Gorges Dam project. (8 marks)
Step-by-step solution
1. Step 1
  Project (1 mark). World's largest hydroelectric station. Yangtze River, China. Completed 2012. ~22,500 MW capacity.
2. Step 2
  Benefit 1 (1 mark). Renewable electricity — supplies ~3% of China's electricity.
3. Step 3
  Benefit 2 (1 mark). Flood control on lower Yangtze; protects 15M people.
4. Step 4
  Benefit 3 (1 mark). Improved navigation; large ships reach inland Chongqing.
5. Step 5
  Cost 1 (1 mark). Displacement — ~1.3 million people relocated.
6. Step 6
  Cost 2 (1 mark). Ecosystem damage — Yangtze finless porpoise endangered; sediment trapped behind dam.
7. Step 7
  Cost 3 (1 mark). Earthquake risk increased due to reservoir water weight.
8. Step 8
  Verdict (1 mark). Net effect mixed — large-scale renewable energy but massive social and ecological costs.
Answer
Three Gorges: benefits = power + flood control + navigation. Costs = displacement + ecology + seismic risk.
Examiner tip
Top-band candidates BALANCE benefits and costs and reach a judgement.
3Sustainable energy strategies (6 marks)
Extended• sustainable energy
Question
Identify THREE strategies for a sustainable energy future. (6 marks)
Step-by-step solution
1. Step 1
  Strategy 1 — energy efficiency (2 marks). Insulation, efficient lighting (LEDs), public transport, electric vehicles, smart grids. Cuts demand.
2. Step 2
  Strategy 2 — renewable rollout (2 marks). Solar farms, wind farms, hydro, geothermal. Replaces fossil fuels gradually.
3. Step 3
  Strategy 3 — storage and grids (2 marks). Batteries store renewable energy for night use. Smart grids balance supply and demand. International interconnections.
4. Step 4
  Bonus. Decentralisation (rooftop solar), nuclear as low-carbon baseload, carbon capture and storage.
Answer
Efficiency + renewables + storage. All three needed together.

Key Definitions and Keywords — Energy Impacts, Sustainability and Case Studies

Definitions to memorise and the exact keywords mark schemes credit for energy impacts, sustainability and case studies answers — sharpened from recent examiner reports for the 2026 0460 sitting.

Climate change
Examiner keyword
Long-term shift in global temperatures and weather patterns — current change driven by greenhouse gas emissions.
Acid rain
Examiner keyword
Precipitation containing dissolved acids — from SO₂ and NO₂ pollution. Damages forests, lakes, buildings.
Energiewende
Germany's energy transition policy — phase-out of nuclear and coal; renewables expansion. Started ~2010.
Carbon capture and storage (CCS)
Trapping CO₂ at the emission source and storing it underground. Limited commercial deployment so far.
Smart grid
Electricity network using digital technology to balance supply and demand efficiently. Critical for renewables integration.

Common Mistakes and Misconceptions — Energy Impacts, Sustainability and Case Studies

The traps other students keep falling into on energy impacts, sustainability and case studies questions — taken from recent Cambridge IGCSE 0460 examiner reports and mark schemes — and how to avoid them.

✕Assuming renewable energy has no environmental impact
0460 Examiner Reports 2022-2024
Why it happens
Marketing emphasises positives.
How to avoid it
Hydro displaces communities; wind affects birds; solar manufacturing has footprint. Trade-offs exist.
✕Assuming technology alone will solve energy challenges
0460 Examiner Reports 2022-2024
Why it happens
Tech-optimism narrative.
How to avoid it
Demand-side efficiency, behaviour change, policy all matter as much as new tech.

Practice questions

Exam-style questions with step-by-step worked solutions. Try one before checking the method.

Past paper style quiz

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Energy Impacts, Sustainability and Case Studies

Short Study Notes in the form of Slides

Short Study Notes — Energy Impacts, Sustainability and Case Studies

Detailed Notes

What you’ll learn

How it’s examined

1Environmental impacts of energy (8 marks)

2Three Gorges Dam case study (8 marks)

3Sustainable energy strategies (6 marks)

Climate change

Acid rain

Energiewende

Carbon capture and storage (CCS)

Smart grid

✕Assuming renewable energy has no environmental impact

✕Assuming technology alone will solve energy challenges

Practice questions

Past paper style quiz

Assess your understanding