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Spec mapping (AQA 7037): primarily Paper 2, §3.2.5 Resource Security (with strong synoptic links to §3.2.4 Population and the Environment and to §3.1.1 Water and Carbon Cycles) — energy as a strategic resource; the global energy mix and the energy transition; energy security and insecurity; the geopolitics of energy; the relationship between energy use, the environment and climate change; the meaning and pursuit of environmental sustainability. Energy is the resource that powers every other system in this option — food production (mechanisation, fertiliser), water supply (pumping, desalination) and health (refrigeration, hospitals) — so it is the natural capstone lesson. It links synoptically to §3.2.1 Global Systems and Global Governance (energy is the most geopolitically charged of all resources, central to international relations) and especially to §3.1.1 Water and Carbon Cycles (fossil-fuel combustion is the dominant driver of the enhanced greenhouse effect and climate change). Assessment objectives: AO1 — knowledge of energy security, the global energy mix, the transition and sustainability concepts; AO2 — application to real contexts (China's transition, UK renewables, the 2022 energy crisis); AO3 — interpretation and evaluation of energy data and of the costs, benefits and feasibility of the transition to reach a substantiated judgement.
This lesson examines energy as a strategic resource: the global energy mix, the tension between fossil-fuel dependence and the transition to renewables, energy security and insecurity, the geopolitics of energy, energy poverty, and the pathways to a sustainable, low-carbon future. Energy is deeply intertwined with population, food, water and health, making it the crucial integrating theme of this whole option.
Key Definition: Energy security is the uninterrupted availability of energy sources at an affordable price (IEA definition). It has both short-term dimensions (the ability to react promptly to sudden changes in supply-demand balance) and long-term dimensions (investment to supply energy in line with economic development and environmental needs).
| Component | Description |
|---|---|
| Availability | Sufficient energy resources exist and can be accessed |
| Affordability | Energy prices are manageable for consumers and industry |
| Reliability | Supply is consistent and not subject to frequent disruption |
| Sustainability | Energy is produced and consumed in ways that do not undermine environmental or social systems |
These four components frequently conflict, which is the central dilemma of energy policy and a rich source of evaluation. The cheapest and most available energy (coal) is the least sustainable; the most sustainable (renewables) has historically raised concerns about reliability (intermittency) and required upfront cost; pursuing affordability through subsidies can lock in fossil dependence and undermine sustainability. This is sometimes called the "energy trilemma" — the difficulty of simultaneously achieving energy security, affordability and environmental sustainability. Different countries, facing different resource endowments and political pressures, strike the balance differently: a petrostate may prioritise revenue and availability, a climate-leading state may prioritise sustainability, and a developing country may prioritise affordability and access above all. Recognising that energy security involves trade-offs between competing goals, not a single target, is what lifts an answer from description to evaluation.
The global energy mix describes the composition of primary energy sources used worldwide.
| Source | Share of Global Energy (%) | Trend |
|---|---|---|
| Oil | 31.2% | Slowly declining |
| Coal | 26.5% | Peaked; declining in HICs but rising in some MICs |
| Natural gas | 23.2% | Growing; seen as "bridge fuel" |
| Hydroelectric | 6.7% | Steady |
| Nuclear | 4.0% | Stable; new investment in some countries |
| Renewables (wind, solar, bioenergy) | 8.4% | Rapid growth; solar capacity doubled 2020–2023 |
Key Statistic: Fossil fuels (oil, coal, natural gas) still account for approximately 81% of global primary energy consumption, despite rapid renewable growth.
Energy is the most geopolitically charged of all resources because its production and consumption are profoundly mismatched in space: a few resource-rich regions (the Gulf, Russia, Central Asia) supply many resource-poor but energy-hungry economies (the EU, Japan, China, India). This creates relationships of dependency between exporters and importers that shape global politics.
Key Definition: Energy mix is the combination of primary energy sources a country uses; the energy transition is the structural shift from a fossil-fuel-dominated mix towards low-carbon sources (renewables, nuclear). A country's energy pathway reflects its resource endowment, wealth, politics and stage of development — which is why no two transitions look alike.
| Source | Technology | Advantages | Disadvantages |
|---|---|---|---|
| Solar | Photovoltaic (PV) panels, concentrated solar power (CSP) | Unlimited supply; rapidly falling costs (solar PV costs fell 89% between 2010 and 2023); low operating emissions | Intermittent (weather-dependent, no generation at night); land use; manufacturing requires rare earth minerals |
| Wind | Onshore and offshore turbines | Mature technology; competitive costs; offshore potential enormous | Intermittent; visual impact; noise; impacts on birds and bats |
| Hydroelectric | Dams and run-of-river schemes | Reliable baseload power; long lifespan; flood control | Requires specific topography; displacement; downstream ecological damage; sedimentation |
| Biomass/Bioenergy | Burning organic matter (wood, waste, crops) or converting to biogas | Carbon-neutral in theory; waste reduction | Land use competition with food; not truly zero-carbon when lifecycle emissions included; air pollution |
| Geothermal | Heat from the Earth's interior | Very reliable; low emissions; small footprint | Geographically limited (volcanic/tectonic areas); high drilling costs |
| Tidal/Wave | Marine turbines and wave energy converters | Predictable (unlike wind/solar); enormous potential | Early-stage technology; high costs; environmental impacts on marine life |
The UK's recent experience is an instructive case of energy insecurity and transition. Once broadly self-sufficient thanks to North Sea oil and gas, the UK became a net energy importer in the 2000s as North Sea production declined, increasing its exposure to global markets. This vulnerability was laid bare in the 2022 energy crisis: although the UK imports little gas directly from Russia, the global gas price spiked when Russia cut supplies to Europe after invading Ukraine, and because UK electricity prices are set by gas-fired generation at the margin, household energy bills more than doubled — typical bills rose above £2,500/year — pushing millions into fuel poverty and forcing huge government subsidies. The crisis demonstrated three lessons central to this topic: that energy security is global (a distant geopolitical event hits domestic bills); that affordability is as much a part of security as availability; and that home-grown renewables offer security as well as climate benefits, because they cannot be embargoed. It accelerated UK and EU plans to expand renewables and reduce gas dependence — energy security and decarbonisation pulling in the same direction.
The UK has made significant progress in renewable energy deployment:
Exam Tip: When discussing renewables, avoid the common misconception that they are always environmentally benign. Discuss land use, mineral extraction (lithium, cobalt for batteries), intermittency, and the challenge of energy storage. This demonstrates evaluative thinking.
Nuclear power occupies a distinctive position in the transition: it is low-carbon (lifecycle emissions comparable to wind) and provides reliable baseload electricity unaffected by weather, making it a potential complement to intermittent renewables. France derives ~70% of its electricity from nuclear, the highest share of any major country, giving it one of the lowest-carbon grids in Europe. But nuclear is deeply contested:
The nuclear debate is an excellent evaluative hook because it pits decarbonisation and energy security (the case for) against cost, safety, waste and proliferation (the case against) — with no consensus even among environmentalists.
Key Definition: Energy poverty (or fuel poverty) is the condition in which a household is unable to afford adequate energy services for heating, cooking, and lighting. In LICs, this often means reliance on biomass fuels; in HICs, it typically means an inability to afford energy bills.
Energy poverty is a powerful illustration of the development–energy link and of the global inequality that runs through this whole option. Access to modern energy is foundational to almost every development goal: without electricity there is no reliable lighting for study, no refrigeration for food or vaccines, no powered water pumps, no modern healthcare, and limited industry or jobs. The reliance of ~2.3 billion people on solid fuels for cooking is not only a health catastrophe (the indoor-air-pollution deaths) but a gendered and environmental one — women and girls spend hours collecting fuelwood (time lost from education and income), and the harvesting contributes to deforestation. Yet energy poverty also offers an opportunity: many LICs are "leapfrogging" the centralised, fossil-fuelled grid model, using off-grid and mini-grid solar to bring power to remote communities far faster and more cheaply than extending the national grid — a clean-energy pathway that the rich world never had. This makes the eradication of energy poverty (Sustainable Development Goal 7) potentially compatible with, rather than opposed to, climate goals.
The landmark international agreement aims to limit global warming to well below 2°C above pre-industrial levels, with efforts to limit to 1.5°C. Key features:
The UK was the first major economy to legislate for net-zero greenhouse gas emissions by 2050 (Climate Change Act, amended 2019). Key policies include:
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