What you'll learn
Food, water and energy are the resources every population depends on, and this topic examines how unevenly they are distributed, how supply and demand are changing, and how shortages can be managed. For AQA GCSE Geography you need to understand the global significance of food, water and energy, the UK's changing position on all three, and then one of the three in depth — most commonly water or food. The examiner's recurring interest is the mismatch between where a resource is available and where it is needed, and whether the strategies used to close that gap are sustainable. This guide covers why these resources matter, the UK's food, water and energy situation, global patterns of supply and demand, the causes and impacts of insecurity, and the strategies used to increase supply and manage demand sustainably. By the end you should be able to explain a supply-demand mismatch and evaluate a management scheme.
Key terms and definitions
Resource — A material or commodity that has value and is useful to people.
Food security — Having reliable access to enough affordable, nutritious food.
Water security — Having reliable access to enough safe, affordable water.
Energy security — Having reliable access to enough affordable energy.
Food miles — The distance food travels from where it is produced to where it is consumed.
Carbon footprint — The total greenhouse gas emissions caused by a person, product or activity.
Agribusiness — Large-scale, capital-intensive commercial farming run as a business.
Water surplus — Where water supply exceeds demand.
Water deficit — Where demand for water exceeds supply.
Water transfer — Moving water by pipeline or canal from an area of surplus to an area of deficit.
Water stress — Where demand for water approaches or exceeds the amount available.
Grey water — Waste water from baths, sinks and washing machines that can be reused.
Desalination — The removal of salt from sea water to produce fresh water.
Sustainable resource management — Using a resource so that it remains available for future generations.
Fracking — Hydraulic fracturing of rock to release trapped oil and gas.
Carbon footprint of food — The emissions associated with producing, processing and transporting food.
Core concepts
Why resources matter
Food, water and energy are unevenly distributed across the world, and consumption is equally uneven. Higher-income countries consume far more per person than lower-income countries, while many of the places with the greatest physical scarcity have the least money to address it. The result is that availability and need rarely coincide, and closing that gap is what resource management is about.
Demand for all three is rising globally, driven by population growth, rising living standards as people in newly emerging economies consume more, and industrialisation, which is energy- and water-hungry.
Food in the UK
UK food consumption has changed markedly. Demand for high-value and exotic foods — out-of-season fruit and vegetables, imported produce — has grown, which increases food miles and therefore the carbon footprint of the UK diet. At the same time there has been growing demand for organic produce and for locally sourced food, together with the spread of farmers' markets and allotments, partly as a response to environmental concerns.
Agribusiness has become dominant: large farms run as businesses, with high inputs of machinery, fertiliser and pesticide, and high yields. It produces cheap food efficiently but raises concerns about soil degradation, water pollution from fertiliser runoff, hedgerow removal, biodiversity loss and animal welfare.
Water in the UK
The UK's water problem is one of distribution rather than total quantity. Rainfall is highest in the north and west, while population and therefore demand are concentrated in the south and east, which is drier. This produces areas of water surplus and areas of water deficit, and the standard response is water transfer from surplus to deficit areas. Transfer schemes are effective but expensive, can damage the ecosystems of the donor river, and are frequently opposed by people in the area losing the water.
Demand is rising because of population growth, more households, and greater domestic use through appliances, showers and garden watering. Water quality is managed through regulation of industrial and agricultural discharge, sewage treatment, and pollution control, since agricultural runoff, industrial waste and untreated sewage all threaten supply.
Energy in the UK
The UK's energy mix has changed substantially. Coal has declined sharply, North Sea oil and gas production has passed its peak, and the share of renewables — wind, solar, biomass and hydroelectricity — has grown, alongside continuing debate about nuclear power.
This shift raises the issue of energy security, because falling domestic production increases reliance on imports. Exploiting remaining fossil fuels brings economic benefit but environmental cost: this is the central argument around fracking, which could increase domestic gas supply and reduce import dependence, but raises concerns about water contamination, small earth tremors, landscape impact, and locking in continued fossil fuel use.
Global water insecurity
Water supply is affected by climate, geology (whether rock is permeable and stores groundwater), pollution, over-abstraction, limited infrastructure and poverty, which prevents investment in supply. Demand rises with population, industry and irrigated agriculture.
Impacts of insecurity include waterborne disease and poor sanitation, reduced food production where irrigation fails, industrial output constrained by lack of water, and conflict where a river crosses national borders and upstream use reduces downstream supply.
Strategies to increase supply include dams and reservoirs, which store water and can generate electricity but flood land and displace people; water transfers; and desalination, which is reliable but energy-intensive and expensive.
Sustainable approaches focus on using less and wasting less: water conservation in homes and industry, groundwater management to prevent over-abstraction, recycling and grey water reuse, and repairing leaking infrastructure, which in many systems loses a substantial share of treated water before it reaches the tap.
Global food insecurity
Supply is affected by climate, technology, pests and disease, water availability, conflict and poverty. Demand rises with population growth and with rising living standards, particularly the shift towards eating more meat, which requires far more land and water per unit of food energy than crops.
Impacts of insecurity include famine and undernutrition, soil erosion as marginal land is cultivated, rising food prices, and social unrest.
Strategies to increase supply include irrigation, aeroponics and hydroponics, which grow plants without soil using very little water, the New Green Revolution using improved seed and appropriate technology, biotechnology, and appropriate technology suited to local conditions and skills.
Sustainable approaches include organic farming, permaculture, urban farming, fish and meat from sustainable sources, seasonal consumption and reducing food waste — a large share of food produced never being eaten.
Global energy insecurity
Energy supply depends on physical availability, cost of exploitation and production, technology, political factors and climate. Demand rises with population, economic development and rising living standards.
Impacts of insecurity include exploration of difficult environments such as deep water and polar regions, economic and industrial output being constrained, rising energy prices, and conflict over resources.
Strategies include developing renewable sources — solar, wind, hydro, geothermal, tidal, wave and biomass — and non-renewable sources including fossil fuels and nuclear. Sustainable approaches focus on energy conservation in homes, transport and industry, efficiency in design and technology, and reducing demand rather than simply increasing supply.
Worked examples
Example 1: Explaining the UK's water supply problem
The north and west receive the highest rainfall because of relief and prevailing westerly winds, but have relatively low population density. The south and east are drier but contain the largest population and the greatest industrial and agricultural demand. The result is surplus in the north and west and deficit in the south and east. The mismatch is therefore one of distribution, not total supply, which is why transfer schemes are the standard response.
Example 2: Explaining why rising living standards increase food demand disproportionately
As incomes rise, diets shift towards more meat and dairy. Producing these requires grazing or feed crops, so far more land, water and energy are needed per unit of food energy than for eating crops directly. Demand therefore rises faster than population alone would suggest, which is why dietary change is treated as a driver of food insecurity in its own right.
Example 3: Evaluating a large dam scheme
A dam provides a reliable water supply, controls flooding, generates hydroelectricity and can support irrigation and recreation. Against this, it is very expensive, floods land and displaces communities, traps sediment that would otherwise fertilise land downstream, disrupts ecosystems and fish migration, and may create tension with downstream countries. A judgement should weigh the scale of benefit against who bears the cost.
Example 4: Evaluating a local sustainable scheme
Small-scale schemes such as rainwater harvesting, sand dams or efficient stoves are cheap, use local materials and skills, are easily maintained and give communities control. Their limitation is scale: they improve conditions for a village rather than a region. A good judgement is that local schemes are more reliably sustainable, while large schemes deliver greater volume at greater social and environmental cost.
Common mistakes and how to avoid them
Saying the UK does not have enough water. The issue is where the water is relative to where the demand is, not the total amount.
Confusing food miles with carbon footprint. Food miles are distance travelled; carbon footprint covers production, processing and transport, so locally grown food produced in a heated greenhouse can have a larger footprint than imported field-grown produce.
Treating agribusiness as simply bad. It produces cheap food at high yields; the criticisms are environmental and ethical, and a balanced answer says both.
Forgetting that renewable does not mean impact-free. Dams flood land, wind farms affect landscapes and biomass requires land.
Listing strategies without evaluating them. Nearly all marks above the bottom band require advantages and disadvantages.
Confusing water stress with water scarcity. Stress is demand approaching supply; scarcity is supply genuinely insufficient.
Ignoring waste. Leaking pipes and uneaten food are among the largest and cheapest opportunities in both water and food management.
Exam technique for "The Challenge of Resource Management"
Frame answers around supply and demand, and explain any mismatch between where a resource is and where it is needed.
Separate increasing supply from managing demand. Sustainability questions usually reward the second more heavily, because reducing use tends to be cheaper and less damaging than building new capacity.
For every strategy, have one benefit and one drawback ready, then give a judgement — that structure fits almost every evaluation question in this topic.
Compare large-scale with small-scale schemes. Large schemes deliver volume at high social and environmental cost; local schemes are cheaper, more sustainable and more limited in reach.
Know one named scheme in detail for your chosen resource, and use the specific figures from the case study you have been taught.
Use the correct terms — water surplus, water deficit, water stress, food security, energy mix — precisely, since several of them are commonly confused.
Quick revision summary
- Food, water and energy are unevenly distributed, and consumption is unevenly distributed too; higher-income countries consume far more per person.
- Demand rises with population growth, rising living standards and industrialisation.
- UK food: more high-value and exotic imports raising food miles, alongside growth in organic and local sourcing; agribusiness gives high yields with environmental costs.
- UK water: surplus in the north and west, deficit in the south and east, addressed by water transfer — effective but costly and contested.
- UK energy: declining coal and North Sea output, growing renewables, continuing debate over nuclear and fracking.
- Water insecurity causes disease, reduced food production, industrial constraint and conflict; managed by dams, transfers, desalination, and by conservation, recycling and leak repair.
- Food insecurity causes famine, soil erosion, price rises and unrest; managed by irrigation, hydroponics, the New Green Revolution, and sustainably by organic farming, permaculture, urban farming and reducing waste.
- Energy insecurity drives exploration of difficult environments and rising prices; managed by renewables, nuclear and above all conservation and efficiency.