Unit 4: Food Issues, Ethics and the Future of Food
What you must understand
Unit 4 asks you to think critically about food as a contested issue. You need to understand sustainability across the food system - environmental (water, land, greenhouse gas emissions, food waste), economic (fair returns, viability) and social (equity, food security, cultural food practices). Know the debates around food production and consumption: intensive vs extensive farming, genetic modification, organic production, food miles, packaging and waste, and the ethics of animal production and labour in food supply chains.
You should be able to analyse a food issue from multiple perspectives - producer, consumer, government, industry, community - and evaluate solutions such as seasonal eating, reducing waste, plant-forward diets, local sourcing and certification schemes. Know the role of government and non-government organisations in shaping food policy and consumer information, and be able to discuss how technology and innovation (alternative proteins, precision agriculture, smart packaging) may change food systems.
Traps in questions
- Defining sustainability as only environmental; economic and social dimensions are required.
- Presenting one perspective as fact; questions reward balanced analysis and explicit trade-offs.
- Confusing food miles with total environmental impact - transport may be a small part of emissions.
- Assuming "organic" or "local" automatically means more sustainable; evaluate evidence and context.
- Describing a solution without naming who implements it and what the barrier is.
Worked example
"Evaluate whether a plant-forward diet is a sustainable solution." A strong answer: environmental benefits (lower land and water use, fewer emissions), health benefits (fibre, reduced saturated fat), economic effects on livestock producers, social and cultural barriers (food traditions, access, cost), and practical constraints (nutritional adequacy, ultra-processed meat alternatives). It concludes with a judgement about conditions under which the solution works, rather than an absolute yes or no.
Rule of thumb
For any Unit 4 issue, use the frame: issue → perspectives → evidence → trade-offs → evaluated solution with an implementer and a barrier.