Food Miles, Seasonal Foods and Local Produce

This lesson covers food miles, seasonal foods and local produce, as required by the AQA GCSE Food Preparation and Nutrition specification (8585), section 3.6. You need to understand the environmental impact of transporting food, the benefits of eating seasonally and locally, and the trade-offs involved.

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What Are Food Miles?

Food miles refers to the distance food travels from where it is produced to where it is consumed. The term is used as an indicator of the environmental impact of food transport.

Why Food Miles Matter

Issue	Explanation
Carbon emissions	Transporting food by road, air, rail or sea produces CO₂ and other greenhouse gases that contribute to climate change
Air pollution	Vehicle emissions contribute to local air pollution
Fuel consumption	Fossil fuels are used for transport, contributing to resource depletion
Packaging	Long-distance transport often requires additional packaging for protection, creating waste
Freshness	The further food travels, the longer it has been since harvest, potentially reducing freshness and nutritional value

Transport Methods and Their Impact

Transport	Carbon Footprint	Speed	Used For
Air freight	Highest — produces the most CO₂ per km	Fastest	Perishable foods: tropical fruits, berries, fresh vegetables, cut flowers
Road (lorry)	High	Moderate	Domestic distribution; European imports
Rail	Moderate	Moderate	Bulk commodities; not common for food in the UK
Sea (shipping)	Lowest per unit — most efficient for bulk transport	Slowest	Bulk imports: bananas, rice, coffee, tea, spices, grains

graph TD
    A["Food Transport<br/>Carbon Impact"] --> B["✈️ AIR<br/>Highest emissions<br/>Fastest"]
    A --> C["🚛 ROAD<br/>High emissions"]
    A --> D["🚂 RAIL<br/>Moderate emissions"]
    A --> E["🚢 SEA<br/>Lowest per-unit<br/>emissions"]

    style B fill:#e74c3c,color:#fff
    style C fill:#e67e22,color:#fff
    style D fill:#f39c12,color:#000
    style E fill:#27ae60,color:#fff

Exam Tip: Air freight has the highest carbon footprint per kilogram of food. However, shipping (sea transport) is much more efficient per unit — this is why bananas from Central America may have a lower carbon footprint per banana than strawberries flown from Spain. The method of transport matters more than distance alone.

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The Limitations of Food Miles

While food miles are a useful concept, they do not tell the whole story about environmental impact:

Limitation	Explanation
Transport method matters more than distance	A banana shipped from Costa Rica may have a lower carbon footprint than a tomato grown in a heated greenhouse in the UK
Production methods matter	A heated greenhouse in the UK uses energy for heating and lighting; outdoor growing in a warm climate uses less energy even with transport added
"Last mile" problem	Driving to a distant farmers' market in a car may produce more emissions than having food delivered to a local supermarket by an efficient lorry
Bulk efficiency	Large-scale shipping is very efficient per unit of food; a small local delivery may be less efficient per item
Overall carbon footprint	Food miles are only one component of a food's total environmental impact — farming methods, processing, packaging and waste all contribute

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Seasonal Foods

Seasonal eating means choosing foods that are naturally in season in the UK at the time of year, rather than importing out-of-season produce.

UK Seasonal Calendar

Season	Fruits	Vegetables
Spring (Mar–May)	Rhubarb, gooseberries	Asparagus, spring onions, radishes, spinach, new potatoes, watercress
Summer (Jun–Aug)	Strawberries, raspberries, cherries, blackcurrants, redcurrants, plums	Tomatoes, courgettes, broad beans, runner beans, peas, lettuce, sweetcorn
Autumn (Sep–Nov)	Apples, pears, blackberries, damsons, elderberries	Pumpkin, squash, beetroot, cauliflower, kale, leeks, parsnips
Winter (Dec–Feb)	Stored apples, pears, forced rhubarb	Brussels sprouts, swede, turnips, parsnips, leeks, celeriac, kale, red cabbage

Benefits of Eating Seasonally

Benefit	Explanation
Reduced food miles	Seasonal UK produce does not need to be imported from distant countries
Lower cost	When produce is in season, supply is high and prices are lower
Better flavour	Produce picked at peak ripeness tastes better than produce picked early for transport
Higher nutritional value	Freshly picked produce retains more vitamins than produce that has been stored or transported for days
Lower environmental impact	No need for heated greenhouses, air freight or long-distance shipping
Supports local farmers	Buying seasonal produce supports UK agriculture
Variety	Encourages eating a diverse range of foods throughout the year

Challenges of Eating Seasonally