Food, Water & Energy in the UK

The UK is a high-income country (HIC) with a large population — around 67 million people — and high per capita resource consumption. This lesson examines how the UK manages its food, water, and energy needs, where the pressures come from, and what challenges lie ahead. This is a key part of the AQA specification and is often tested as a shorter-answer section in the exam.

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Overview of UK Resource Demands

The UK faces a growing challenge: its population is rising, its lifestyles are becoming more resource-intensive, and its domestic supplies of key resources are declining or under pressure.

Resource	UK Status
Food	The UK imports about 46% of its food; domestic production is declining in some sectors
Water	The south-east has a water deficit; the north and west have a surplus
Energy	The UK's North Sea oil and gas reserves are declining; the energy mix is shifting toward renewables

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Food in the UK

The UK's Changing Food Demands

The UK's food consumption has changed dramatically over the past 50 years:

• Demand for greater variety — consumers expect exotic fruits, out-of-season vegetables, and diverse cuisines year-round
• Organic and ethical food — growing demand for organic produce, free-range meat, and Fairtrade products
• Processed and convenience food — busy lifestyles have increased demand for ready meals and takeaways
• Carbon footprint awareness — some consumers are choosing to buy local and seasonal food to reduce food miles

Food Miles and the Carbon Footprint

Food miles refers to the distance food travels from where it is produced to where it is consumed.

Food Item	Typical Origin	Approximate Distance
Lamb	New Zealand	18,800 km
Avocados	Peru / Mexico	10,000+ km
Green beans	Kenya	6,800 km
Apples	South Africa	9,600 km
Beef	UK / Ireland	Under 500 km

Exam Tip: Food miles are not always a straightforward measure of environmental impact. Growing tomatoes in a heated greenhouse in the UK in winter may produce more CO2 than shipping them from Spain where they grow naturally in the sun. Always consider the full carbon footprint, not just transport distance.

The Decline of UK Agriculture

• The UK's agricultural workforce has shrunk — fewer than 1.5% of workers are employed in farming
• Many small farms have been replaced by large agribusinesses
• UK self-sufficiency in food has fallen from about 75% in the 1980s to around 54% today
• Brexit has created uncertainty about trade deals and migrant agricultural labour

Agribusiness

Agribusiness is the industrialisation of farming — large-scale, mechanised, technology-driven agriculture aimed at maximising output and profit. In the UK, agribusiness dominates sectors like cereal production, dairy, and poultry. While efficient, it raises concerns about:

• Environmental damage — hedgerow removal, pesticide use, soil degradation
• Animal welfare — intensive livestock farming
• Loss of biodiversity — monoculture farming reduces wildlife habitats

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Water in the UK

Supply and Demand Imbalance

The UK has a significant geographical imbalance between water supply and demand:

Region	Rainfall	Population Density	Status
North and West (Scotland, Wales, Lake District, Pennines)	High — over 2,000 mm/year in some areas	Relatively low	Water surplus
South and East (London, South East, East Anglia)	Lower — under 700 mm/year in parts of East Anglia	Very high — London alone has 9 million people	Water deficit

This means the areas with the most people have the least water, and vice versa.

Reasons for Increasing Demand

• Population growth — the UK population has grown by over 10 million since 1970, concentrated in the south-east
• Changing lifestyles — power showers, dishwashers, washing machines, and garden sprinklers all increase water use
• Economic activity — offices, factories, shops, and restaurants all consume water
• Leakage — an estimated 3 billion litres per day are lost through leaking pipes in England and Wales

Managing Water Supply

The UK uses several strategies to manage its water:

• Water transfer schemes — moving water from areas of surplus to areas of deficit (e.g. the Kielder Water scheme in Northumberland, which can transfer water to the Tees, Wear, and Tyne)
• Reservoirs — storing water in artificial lakes for use during dry periods
• Desalination — the Thames Gateway Water Treatment Works in East London uses desalination, though it is energy-intensive
• Demand management — water meters, hosepipe bans, public awareness campaigns

Exam Tip: Be ready to discuss arguments for and against water transfer schemes. Supporters say they solve the supply-demand imbalance; critics argue they are expensive, environmentally damaging, and encourage wasteful consumption rather than conservation.

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Energy in the UK

The Changing UK Energy Mix

The UK's energy mix has changed significantly over the past few decades:

Decade	Dominant Sources
1950s–1980s	Coal dominated electricity generation
1990s–2000s	Natural gas (from the North Sea) overtook coal
2010s–present	Renewables (wind, solar, biomass) growing rapidly; coal almost eliminated

In 2020, the UK went coal-free for its longest ever period — more than two months. By 2024, the UK's last coal-fired power station closed.

UK Energy Sources

Source	% of UK Electricity (approx. 2023)	Notes
Wind	~29%	Offshore wind is the UK's fastest-growing energy source
Natural gas	~32%	Still the single largest source, but declining
Nuclear	~15%	Ageing power stations; Hinkley Point C under construction
Solar	~4%	Growing, but limited by UK weather
Biomass	~5%	Drax power station in Yorkshire converted from coal to biomass
Coal	~1%	Almost completely phased out

The Decline of North Sea Oil and Gas

The UK has been extracting oil and gas from the North Sea since the 1970s. Production peaked around 1999 and has been declining ever since. This means:

• The UK has become a net importer of energy — it imports more than it produces
• Energy security is a growing concern — the UK is dependent on other countries (e.g. Norway, Qatar) for gas supplies
• There is pressure to develop domestic renewable energy to reduce this dependency

Economic and Environmental Issues

• Fracking — hydraulic fracturing to extract shale gas has been controversial in the UK (e.g. protests at Preston New Road in Lancashire); a moratorium was introduced in 2019
• Wind farm opposition — some communities oppose onshore wind farms due to visual impact and noise
• Nuclear concerns — safety, waste disposal, and the high cost of new power stations (Hinkley Point C is expected to cost over £30 billion)
• Fuel poverty — rising energy prices mean some households cannot afford to heat their homes adequately

Exam Tip: The exam may ask you to evaluate the UK's energy mix. Make sure you can discuss the advantages and disadvantages of at least three different energy sources, and always link your answer to the idea of balancing energy security, cost, and environmental sustainability.

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Interconnections: The Food-Water-Energy Nexus in the UK

In the UK, these three resources are deeply connected: