Resource Management Overview

🔍 What Is a Resource? The Three That Matter Most

Figure 1: The Food-Energy-Water (FEW) Nexus — each resource depends on and affects the other two

A natural resource is anything taken from the natural environment to meet human needs. Resources can be divided into two fundamental types:

• Renewable resources can be replaced naturally at a rate fast enough to meet human use — solar energy, wind, wave, tidal, sustainably harvested crops. They do not run out if managed carefully.
• Non-renewable resources form over geological timescales far longer than human use — coal, oil, natural gas, and mineral ores. Once used, they are effectively gone. Fossil groundwater — ancient water trapped in underground aquifers — also falls into this category.

For GCSE Geography, three resources sit at the heart of the topic:

Food

Food provides the calories, protein, and nutrients that human bodies need to function. Food security means having reliable, affordable access to enough nutritious food. The world currently produces enough calories to feed every person alive — yet 733 million people face hunger (FAO, 2023). This is not a production problem. It is a distribution problem, an access problem, and a governance problem. The hungry are not in places with no food; they are in places where food is unaffordable, inaccessible, or disrupted by conflict and climate extremes.

Water

Freshwater is essential for drinking, hygiene, agriculture, and industry. Of all the water on Earth, only 3% is freshwater — and of that, approximately two-thirds is locked in ice caps and glaciers. This leaves roughly 1% of Earth's total water accessible for human use in lakes, rivers, and shallow groundwater. 2.3 billion people live in water-stressed countries (UN, 2023) — places where water demand approaches or exceeds available supply. Access to safe water is unevenly distributed, with the greatest shortfalls in the Middle East, North Africa, and parts of Sub-Saharan Africa and South Asia.

Energy

Energy powers homes, factories, transport, and farming. There is a strong correlation between energy access and human development: countries with reliable, affordable energy tend to have better health outcomes, higher incomes, and greater food security. Yet 733 million people have no electricity access (IEA, 2022) — the vast majority in Sub-Saharan Africa and South Asia. Energy poverty traps communities in cycles of disadvantage: without electricity, hospitals cannot run properly, children cannot study after dark, and local businesses cannot compete.

🗺️ Global Distribution: The Mismatch Problem

The most important geographical fact about resources is this: resources are not where people are. The mismatch between where resources exist in the ground, where they are produced, and where populations live creates the tension at the heart of all resource management challenges.

Food Distribution

The world's major grain-producing regions are concentrated in a handful of countries and agricultural zones: the American Great Plains (the world's "bread basket"), the North China Plain, the Indo-Gangetic Plain of South Asia, the Russian steppe, and the agricultural heartlands of France and Germany. Yet the regions with the highest rates of hunger — Sub-Saharan Africa, the Sahel, South Asia, and parts of Central America — often have poor soils, unreliable rainfall, and limited access to fertilisers and irrigation.

Global food trade partly bridges this gap: countries that produce surpluses export to countries with deficits. But international food markets are priced in US dollars, and the world's hungriest people are often in the world's poorest countries — unable to compete in global markets when prices rise. The 2007–08 global food price crisis, when wheat prices doubled, triggered food riots in over 30 countries.

Water Distribution

Freshwater is concentrated in a relatively small number of regions. The Amazon basin in South America holds more surface freshwater than almost anywhere on Earth. The Congo basin, the Canadian Shield, and the Nordic countries (including Iceland) are also richly endowed with freshwater. Yet several of the world's most populous regions face severe water scarcity:

• Middle East and North Africa (MENA) — arid climate, extremely limited rainfall, rapidly growing populations. Countries including Jordan, Libya, and Kuwait use more water than their natural renewable supply — drawing down fossil groundwater that cannot be replaced.
• Sub-Saharan Africa — rainfall is unreliable and seasonal; infrastructure to store and distribute water is often inadequate; millions rely on unprotected wells and rivers that are vulnerable to contamination.
• South Asia — large populations in India, Pakistan, and Bangladesh depend on monsoon rainfall and Himalayan glacial meltwater; both are threatened by climate change.

A country or region is classified as water-stressed when it uses more than 25% of its available renewable freshwater supply annually. At over 40% usage, it is classified as severely water-stressed.

Energy Distribution

Fossil fuel reserves are unevenly distributed by geology. The world's largest oil reserves are in the Middle East — Saudi Arabia, Iraq, Kuwait, the UAE, and Iran hold roughly half of all known oil reserves. Russia and the USA dominate natural gas production. Coal is found more widely, with major reserves in Australia, China, the USA, India, and Russia.

Renewable energy resources, by contrast, are more widely distributed — but exploiting them requires investment in technology and infrastructure. Denmark generates over 50% of its electricity from wind. Iceland meets almost 100% of its electricity needs from geothermal and hydroelectric sources. China has become the world's largest installer of solar panels. However, the countries with the greatest renewable energy potential — high solar irradiance in Sub-Saharan Africa and the Sahara, for example — are often the poorest and least able to build the infrastructure to use it.

⚙️ The FEW Nexus: Food, Energy, and Water Are Inseparable

One of the most important concepts in resource management is the Food-Energy-Water (FEW) Nexus — the deeply interlinked relationship between these three resource systems. You cannot manage one without affecting the others. A policy designed to increase food production may inadvertently worsen water scarcity. Expanding a country's water supply requires energy. Generating more electricity from hydropower dams can reduce water flow to farms downstream.

Understanding the nexus is essential for reaching the highest marks in any resource management question. It allows you to show that resource challenges are systemic — they cannot be fixed with a single isolated solution.

How Food Depends on Water and Energy

Agriculture is the single largest user of freshwater globally: approximately 70% of all freshwater withdrawals worldwide go to irrigation. In water-scarce regions, this creates intense competition between food production and other water needs. Growing one kilogram of beef requires approximately 15,500 litres of water — mainly to grow the grain fed to livestock. By contrast, producing one kilogram of wheat requires roughly 1,600 litres. As diets shift towards more meat in emerging economies, water demand from agriculture rises sharply.

Modern food production also depends heavily on energy. The Haber-Bosch process — used to synthesise nitrogen fertiliser — is one of the most energy-intensive industrial processes on Earth, consuming roughly 2% of global energy supply. Farm machinery runs on diesel or electricity. Food processing, packaging, cold storage, and transport all require energy. A typical UK meal has travelled an average of 1,000 miles from field to plate.

How Energy Depends on Water

Most electricity generation requires water. Hydroelectric power dams river water to generate electricity — but this removes water from downstream agriculture and communities. Nuclear and coal power stations use enormous volumes of water for cooling: a single large nuclear plant can use over 2 billion litres of water per day. Even desalination plants — built specifically to address water scarcity — require large amounts of energy to operate: desalinating one cubic metre of seawater uses roughly 3–10 kilowatt-hours of electricity.

How Water Depends on Energy

Treating and distributing safe drinking water requires significant energy: pumping water through distribution networks, filtering it, adding chlorine, and treating wastewater. Thames Water, which supplies London, spends approximately £100 million per year on energy. In low-income countries without reliable electricity, water treatment plants cannot function properly — which is one reason why 2 billion people still drink water contaminated with faecal bacteria.

This nexus thinking is what separates Level 3 geography answers from Level 1 answers. The question asks about one resource; the student shows how that resource connects to others. That is systems thinking — and it is exactly what examiners reward.

📈 Why Resource Demand Is Rising: Four Interconnected Drivers

Demand for food, water, and energy is increasing faster than in any previous century. There is not one single cause — four major forces interact and amplify each other.

1. Population Growth

In 1800, the global population was around 1 billion. In 1927, it reached 2 billion. It hit 8 billion in 2022 — just 12 years after reaching 7 billion — and is projected to reach 9.7 billion by 2050 (UN medium projection). More people means more mouths to feed, more bodies needing water, and more households demanding energy. The fastest population growth is in the regions already most resource-stressed: Sub-Saharan Africa is projected to add 1.1 billion people by 2050 — a region already struggling to provide reliable food, water, and electricity for current populations.

2. Economic Development and Changing Diets

As countries develop economically — particularly China, India, Brazil, and Nigeria — rising incomes change what people consume. The most significant shift is from plant-based diets to meat-heavy diets. China's pork consumption grew by over 500% between 1980 and 2020. Producing 1 kg of beef requires approximately 10 times more land, 8 times more water, and significantly more energy than producing equivalent calories from grain or vegetables. As hundreds of millions of people join the global middle class and begin eating diets similar to those in the UK or USA, the resource demands of food systems multiply dramatically.

Economic development also drives car ownership, air travel, and manufactured goods — all highly energy-intensive. China's energy consumption increased by roughly 600% between 1990 and 2020 as its economy industrialised.

3. Urbanisation

In 2007, for the first time in history, more than half the world's population lived in cities. By 2050, the UN projects that 68% of humanity will be urban. Cities are resource-intensive environments: urban lifestyles require more energy per person than rural ones (lighting, heating and cooling buildings, transport, refrigeration); urban food systems involve more processing and packaging; and cities generate concentrated demands on water supply and sewage infrastructure.

Urbanisation in rapidly growing cities in the Global South — Lagos, Dhaka, Kinshasa, Karachi — also creates informal settlements where water and energy connections are absent or unreliable, creating a different kind of resource pressure: not too much demand, but inadequate infrastructure to deliver supply to those who need it.

4. Climate Change

Climate change is both increasing demand and reducing supply simultaneously — making it the most complex of the four drivers. On the demand side, rising temperatures increase the need for irrigation (crops wilt faster in heat), energy for cooling (air conditioning), and water purification (contamination rates rise with temperature). On the supply side, changing rainfall patterns are making droughts more frequent and prolonged in already-dry regions; glacial retreat is reducing the dry-season water supply for the 2 billion people who depend on glaciers (in the Himalayas, Andes, and Alps); and extreme weather events are disrupting food production worldwide.

The most dramatic recent illustration: the 2022 Pakistan floods — partly driven by Himalayan glacial melt accelerated by climate change — inundated one-third of the country's agricultural land, destroying crops, contaminating water supplies, and displacing 33 million people.

🇬🇧 The UK's Resource Situation

The United Kingdom is a wealthy country with well-developed infrastructure — but it faces real resource challenges that illustrate how resource insecurity is not limited to low-income countries. Understanding the UK's specific situation is important for exam questions that require domestic examples alongside global ones.

UK Food: High Imports, Growing Vulnerabilities

The UK imports approximately 46% of its food, worth over £50 billion per year. The UK is broadly self-sufficient in cereals (wheat, barley), dairy, and some meats — but heavily dependent on imports for fruit and vegetables. Around 97% of the tomatoes consumed in the UK are imported, mostly from Spain and the Netherlands. Nearly all citrus fruit, bananas, and coffee come from overseas.

This import dependence creates vulnerabilities:

• Brexit supply chain disruption — changes to customs and border arrangements after 2020 increased delays and costs for food imports from the EU, contributing to supermarket shortages in early 2021.
• Global price volatility — Russia's invasion of Ukraine in 2022 blocked exports of Ukrainian wheat and sunflower oil (Ukraine provides roughly 50% of global sunflower oil), causing price spikes in UK supermarkets within months.
• Climate impacts on British farming — the UK's changing climate (wetter winters, drier summers) is expected to reduce yields of some crops and make growing conditions less predictable. The 2022 summer drought in the UK was the driest since 1976.
• Environmental footprint — the UK food system accounts for approximately 30% of all UK greenhouse gas emissions when land use change overseas is included. This creates pressure to reform food production and reduce meat consumption.

UK Water: Wet Country, Stressed Region

The UK has a reputation as a rainy country — and nationally, it does receive reasonable rainfall (around 1,100mm per year on average). But this masks an extreme regional imbalance:

• North and West — the Scottish Highlands, Lake District, and Wales receive well over 2,000mm per year — some upland areas receive over 4,000mm. Population density is relatively low.
• South and East — receives under 600mm per year in many areas; this is similar to semi-arid regions. Yet this is where most of England's population is concentrated — Greater London (9 million people), the South East, and East Anglia.

South-East England is classified as "seriously water-stressed" by the Environment Agency — meaning demand exceeds 40% of available supply. Thames Water, which supplies London and the Thames Valley, loses approximately 24% of its supply through leakage in its aging pipe network. By the 2050s, climate projections suggest South-East England will experience 15–25% drier summers, while the population continues to grow. New reservoirs, water transfer schemes, and widespread household metering are all under consideration.

UK Energy: Transition in Progress

The UK's energy mix has changed dramatically in the past 15 years. Coal, which supplied over 40% of UK electricity in 2010, has been almost completely phased out — the last coal-fired power station closed in 2024. Wind and other renewables now provide over 32% of electricity, and the government has set a target of clean power by 2030.

But the UK faces significant energy challenges:

• North Sea decline — UK oil and gas production in the North Sea has been falling for decades as reserves deplete; the UK is increasingly a net importer of fossil fuels.
• Heating dependency — approximately 80% of UK homes use gas boilers for heating and hot water. Replacing these with heat pumps or hydrogen as part of the transition to net zero will cost tens of billions of pounds.
• Intermittency — wind and solar are intermittent: they generate electricity only when the wind blows and the sun shines. Storing excess electricity for calm or cloudy periods is a major engineering and cost challenge.
• Opportunity: offshore wind — the UK has some of the best offshore wind resources in the world. Hornsea One, opened in 2019 off the Yorkshire coast, was the world's largest offshore wind farm at 1.2 GW capacity, powering over 1 million homes.

🌱 Managing Resources Sustainably: Scales of Intervention

Sustainable resource management means meeting present needs without compromising the ability of future generations to meet their own needs (Brundtland Commission definition, 1987). In practice, this requires action at multiple scales simultaneously — individual, community, national, and international. No single level can solve the problem alone.

Individual and Household Scale

Individual actions have a real cumulative impact, especially in wealthy countries where per-person resource consumption is highest:

• Reducing food waste — the UK wastes 9.5 million tonnes of food per year, worth £19 billion. Reducing this waste is one of the most cost-effective ways to lower the UK's resource footprint.
• Dietary change — shifting from beef and lamb to chicken, fish, or plant-based proteins can cut the water and land footprint of a diet by 50–80%. This is the single largest individual action available in food-secure countries.
• Water efficiency — low-flow shower heads, dual-flush toilets, and smart meters that show usage in real time reduce household water consumption. Metered households use approximately 15% less water than unmetered ones.
• Energy efficiency — LED lighting, improved insulation (loft and cavity wall insulation reduces heating bills by 20–30%), and switching to electric vehicles all reduce household energy demand.

National Government Scale

Governments set the legal frameworks, financial incentives, and infrastructure investments that individual choices depend on:

• UK 2030 Clean Power Target — requires all electricity to be generated from low-carbon sources by 2030, driving investment in offshore wind, solar, and nuclear.
• Farming subsidies — post-Brexit, the UK is shifting from EU Common Agricultural Policy payments (which rewarded production volume) to Environmental Land Management (ELM) schemes, which pay farmers to protect soils, reduce pesticide use, and restore habitats.
• Building regulations — since 2022, new homes in England must be built with water efficiency standards of 110 litres per person per day (the current average is around 142 litres).
• WRAP (Waste and Resources Action Programme) — a UK government-funded body working with supermarkets and food producers to reduce food waste across the supply chain.

International Scale

Resource challenges cross national borders — water flows across countries, food is traded globally, and greenhouse gas emissions from one country affect climate everywhere:

• UN Sustainable Development Goals (SDGs) — the 2030 Agenda includes SDG 2 (Zero Hunger), SDG 6 (Clean Water and Sanitation), and SDG 7 (Affordable and Clean Energy). These set measurable targets for global resource security.
• The Paris Agreement (2015) — 196 countries committed to limiting global warming to well below 2°C, targeting 1.5°C, which would significantly reduce the climate-driven disruption to food and water supplies.
• International water agreements — treaties governing shared rivers (the Nile Basin Initiative, the Indus Waters Treaty between India and Pakistan) attempt to manage transboundary water resources, though these are increasingly under strain as demand grows.