Sustainable Food & Local Schemes Revision Notes | GCSE AQA Higher Geography

1. Why Sustainable Food Supply Matters

The global food system feeds over eight billion people — but it is also one of the biggest drivers of deforestation, water depletion, and greenhouse gas emissions. The challenge is not producing more food; it is producing food in ways that can continue indefinitely without destroying the systems that make farming possible in the first place.

Demand for food is rising fastest in lower-income countries (LICs) and newly emerging economies (NEEs), where population growth and urbanisation are changing diets and supply chains. At the same time, climate change is making traditional farming less reliable in many regions. This is why sustainable food supply sits at the heart of AQA's resource management topic.

There is no single solution. Instead, geographers identify a range of strategies — from changes to farming methods, to shifts in what consumers buy and how much they waste. The next section walks through each one so you can explain and evaluate them in the exam.

2. Strategies for Sustainable Food Production

Think of these strategies as sitting on a spectrum: some change how food is grown, others change where it is grown, and others focus on reducing what is lost or wasted. You need to be able to explain how each one improves sustainability — not just name it.

2a. Organic Farming

Organic farming removes synthetic pesticides and artificial fertilisers from the production process. Instead, farmers use crop rotation, composting, and natural pest control. This protects soil structure, reduces chemical runoff into waterways, and supports biodiversity — all of which make the land more productive over the long term.

The trade-off is yield. Organic farms typically produce less per hectare than conventionally farmed land, which means organic food often costs more. This raises a fairness question: sustainable food should be accessible to everyone, not only those who can afford a premium price.

2b. Permaculture

Permaculture takes organic principles further by designing entire food-growing systems to mimic natural ecosystems. Rather than monocultures (single-crop fields), permaculture uses diverse combinations of trees, shrubs, vegetables, and animals that support each other — for example, nitrogen-fixing plants that naturally fertilise the soil around them.

Because permaculture systems are self-sustaining once established, they require fewer external inputs over time. They are particularly valuable in areas with degraded soils or limited access to fertilisers, making them relevant in many LIC and NEE contexts.

2c. Urban Farming Initiatives

Urban farming brings food production into cities — on rooftops, in community gardens, in vertical farms, and on unused land. This cuts food miles dramatically, since produce travels metres rather than thousands of kilometres. It also reconnects urban communities with food production and can improve food security in areas where fresh produce is expensive or hard to access.

Vertical farming — growing crops in stacked layers under artificial light — can produce high yields in very small spaces. However, the energy costs of artificial lighting can be significant, which raises questions about whether the carbon savings from reduced transport outweigh the emissions from electricity use.

2d. Fish and Meat from Sustainable Sources

Overfishing has depleted fish stocks in many of the world's oceans. Sustainable fishing means catching fish at a rate that allows populations to recover — using methods such as setting catch quotas, avoiding certain breeding seasons, and using nets with larger mesh sizes so juvenile fish escape. Certification schemes such as the Marine Stewardship Council (MSC) label help consumers identify sustainably caught fish.

For meat, sustainability involves reducing the environmental cost of livestock farming. Beef production, for example, requires large areas of land and produces significant methane emissions. Shifting towards lower-impact proteins — such as poultry, insects, or plant-based alternatives — reduces the land and water footprint of the food system. Consumers in HICs are increasingly being encouraged to reduce red meat consumption for this reason.

2e. Seasonal Food Consumption

Eating food that is in season locally means it does not need to be imported from distant countries or grown in energy-intensive heated greenhouses. Strawberries grown in the UK in June have a far lower carbon footprint than strawberries flown in from South America in January. Seasonal eating also tends to support local farmers and reduce packaging requirements.

2f. Reducing Food Waste and Losses

Roughly one-third of all food produced globally is lost or wasted before it is eaten. Losses occur at every stage: crops spoil in fields, food is damaged during transport, supermarkets reject produce that does not meet cosmetic standards, and consumers throw away food they do not use. Reducing waste is one of the most efficient ways to improve food sustainability because it makes better use of resources already invested in production.

In LICs, most food loss happens early in the supply chain — during harvest, storage, and transport — often because of poor infrastructure or lack of refrigeration. In HICs, most waste happens at the consumer end. This distinction matters for exam questions asking you to explain where and why waste occurs differently in different contexts.

• Organic farming: protects soil health and biodiversity; lower yields and higher cost
• Permaculture: self-sustaining diverse systems; requires design expertise to establish
• Urban farming: cuts food miles and improves city food access; energy costs for indoor systems
• Sustainable fish and meat: protects ecosystems and stocks; requires regulation and consumer behaviour change
• Seasonal food consumption: reduces transport and energy emissions; limits consumer choice
• Reducing waste and losses: highly efficient use of existing resources; requires infrastructure investment in LICs

3. A Local Scheme in an LIC or NEE: Case Study

Knowing the strategies is one thing — applying them to a real place is what the exam requires. The specification asks you to know one example of a local scheme in an LIC or NEE that increases sustainable food supplies. The example below is the Malawi Farmer Field Schools programme, which illustrates several of the strategies you have just studied working together at community level.

Case Study: Farmer Field Schools, Malawi (sub-Saharan Africa, LIC)Malawi is one of the world's poorest countries, heavily dependent on smallholder agriculture. Erratic rainfall linked to climate change, soil degradation from intensive maize monocultures, and limited access to inputs have reduced food security for millions of rural households.

Farmer Field Schools (FFS) are community-based learning groups where farmers meet regularly to trial and share sustainable farming techniques. Supported by organisations including the Food and Agriculture Organisation (FAO), the scheme has introduced agroforestry (planting trees alongside crops to restore soil fertility — a permaculture principle), conservation agriculture (minimum tillage to protect soil structure), and improved seed varieties suited to drier conditions.

Outcomes reported include improved crop yields for participating farmers, reduced dependence on expensive chemical fertilisers, and better resilience to drought years [VERIFY exact yield figures]. The scheme also reduces food losses by teaching better post-harvest storage techniques — directly addressing the LIC pattern of early supply-chain waste noted earlier. Critically, the knowledge stays within the community: farmers train other farmers, making the scheme self-sustaining over time.

Limitations remain. Uptake depends on farmers having time to attend sessions, which is difficult during planting and harvest seasons. Benefits are most visible at small scale; scaling up across a whole country requires sustained funding and government support. Nevertheless, the FFS model demonstrates how local, low-cost interventions can embed multiple sustainable food strategies simultaneously.

4. Evaluating Sustainable Food Strategies: Exam Technique

Now that you have the knowledge, the final step is turning it into marks. Questions on this topic often use the command words assess, evaluate, or to what extent — all of which require you to weigh up evidence and reach a judgement. Describing strategies without evaluating them will keep you in the lower mark bands.

Worked example: How to Answer an Evaluate Question on Sustainable Food

Evaluate the effectiveness of strategies to achieve sustainable food supply. [9 marks]

1. Choose one strategy with clear evidence of effectiveness. Example: reducing food waste is highly efficient because it improves sustainability without requiring new land or technology — it uses resources already invested in production. — Start with your strongest argument. This sets a confident tone and gives the examiner a clear point to credit.
2. Urban farming initiatives reduce food miles and improve access to fresh produce in cities, addressing both environmental and social dimensions of sustainability. — A second developed point shows breadth. Link it to a different aspect of sustainability (environmental, social, or economic) to show range.
3. However, organic farming — while environmentally beneficial — typically produces lower yields than conventional farming. This means it may struggle to feed a growing global population without significant land expansion, which could itself cause deforestation. — The word 'however' signals evaluation. Examiners are looking for this balance. A limitation that links to a wider consequence is stronger than a simple 'it costs more'.
4. In Malawi, Farmer Field Schools have combined agroforestry and conservation agriculture to improve yields and reduce fertiliser dependence at community level [VERIFY exact figures], showing that local schemes can embed multiple strategies simultaneously. — Named place + specific detail = case study marks. Always name the country and the scheme. Add [VERIFY] if you are unsure of exact statistics.
5. Overall, sustainable food strategies are most effective when combined rather than used in isolation. No single approach solves every dimension of the problem, but local schemes like Farmer Field Schools show that community-level action can deliver real improvements in food security and environmental resilience. — The conclusion must directly answer the question. Use 'overall' or 'on balance' to signal your judgement. Avoid sitting on the fence — commit to a position supported by your evidence.

Answer: Sustainable food strategies are effective when combined. Reducing waste and urban farming address environmental and social sustainability with relatively low trade-offs. Organic farming is environmentally sound but faces yield limitations. Local schemes in LICs, such as Farmer Field Schools in Malawi, demonstrate that integrating multiple strategies at community level can improve food security sustainably. Overall, no single strategy is sufficient alone — effectiveness depends on context, scale, and the combination of approaches used.

Together, the six strategies — organic farming, permaculture, urban farming, sustainable fish and meat, seasonal consumption, and reducing waste — form a toolkit for addressing the food supply challenge from multiple angles. The Malawi Farmer Field Schools case study shows how several of these can be combined at local level in an LIC context, which is exactly what the specification requires you to know.