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This lesson provides focused exam revision and practice for the ecological and social footprint topics covered in AQA GCSE D&T (8552), Sections 3.2.3 and 3.2.4. These sections are tested every year in the Paper 1 exam and frequently appear as extended response questions worth 6-8 marks.
The ecological and social footprint content spans two specification sections:
| Section | Topic | Key Content |
|---|---|---|
| 3.2.3 | Ecological issues | Environmental impact of extraction, carbon footprint, six Rs, LCA, planned obsolescence |
| 3.2.4 | Sources and origins | Where materials come from, FSC/PEFC, processing raw materials, fair trade, ethical sourcing |
AQA Exam Tip: Questions on ecological and social footprint often overlap with other topics. For example, a question about selecting a material for a product may expect you to discuss BOTH functional properties AND environmental/ethical considerations. Always look for opportunities to bring in sustainability and ethical sourcing, even if the question does not explicitly ask for it — this shows the breadth of understanding that examiners reward.
| Term | Definition |
|---|---|
| Carbon footprint | The total greenhouse gas emissions produced by a product, activity, or organisation across its life cycle, measured in kg CO2e |
| Life cycle assessment (LCA) | A method for evaluating the total environmental impact of a product from cradle to grave |
| Cradle to grave | The full life cycle from raw material extraction to disposal |
| Cradle to cradle | A circular approach where materials are recovered and reused indefinitely |
| Planned obsolescence | Deliberately designing a product to have a limited lifespan |
| The six Rs | Refuse, Reduce, Reuse, Repair, Rethink, Recycle |
| FSC | Forest Stewardship Council — certifies timber from sustainably managed forests |
| PEFC | Programme for the Endorsement of Forest Certification — endorses national forest certification schemes |
| Fair trade | A trading system that ensures fair prices, safe conditions, and community benefits for producers in developing countries |
| Conflict minerals | Tin, tantalum, tungsten, and gold (3TG) mined in conflict zones that may fund armed groups |
| Embodied energy/carbon | The total energy used or CO2 produced in extracting, processing, and manufacturing a material |
| Bioplastic | A polymer derived from renewable biological sources rather than fossil fuels |
| Thermoplastic | A polymer that can be reheated and reshaped — recyclable |
| Thermosetting polymer | A polymer with cross-linked chains that cannot be reheated and reshaped — not recyclable |
Question: Discuss the environmental and social impact of using cotton for a range of school uniform polo shirts. [6 marks]
Model Answer:
Cotton has significant environmental impacts throughout its life cycle. Growing conventional cotton requires large amounts of water — approximately 10,000 litres to produce one kilogram of cotton fibre — placing pressure on freshwater resources, particularly in arid growing regions like India and Uzbekistan. Cotton farming also uses substantial quantities of chemical pesticides and fertilisers, which can pollute waterways through runoff and harm biodiversity.
The processing of cotton into fabric involves further environmental impacts. The fibres must be cleaned, spun, woven, and dyed — processes that consume energy and produce wastewater containing chemical dyes and finishing agents. The carbon footprint of a single cotton t-shirt is approximately 7-8 kg CO2e.
From a social perspective, cotton has been associated with poor working conditions. In some growing regions, child labour is still used during the harvest. The Rana Plaza disaster in 2013 highlighted the dangerous conditions in garment factories, many of which produce cotton clothing for Western brands.
However, there are more sustainable alternatives within cotton production. Organic cotton is grown without synthetic pesticides or fertilisers, reducing environmental harm. Fairtrade cotton guarantees fair prices and safe conditions for farmers. Recycled cotton avoids the need for new raw material entirely. A designer specifying school uniform polo shirts could reduce the negative impact by choosing GOTS-certified organic cotton from Fairtrade-certified suppliers.
In conclusion, while cotton is a comfortable and functional fabric for school uniforms, its environmental and social costs are significant. Responsible sourcing through certification schemes can substantially mitigate these impacts.
| Mistake | Why It Loses Marks | Correct Approach |
|---|---|---|
| Saying "plastic is bad for the environment" without explanation | Too vague; no specific analysis | Specify WHICH plastic, WHICH environmental impact (ocean pollution, non-biodegradable, fossil fuel derived), and WHAT alternatives exist |
| Confusing thermoplastics and thermosetting polymers | Fundamental classification error | Thermoplastics soften when heated (recyclable); thermosets do not soften (not recyclable) |
| Naming a certification without explaining what it means | Shows recall but not understanding | Explain what FSC/PEFC/Fairtrade guarantees in practice |
| Ignoring the social dimension | Ecological and social are both in the specification | Address BOTH environmental AND social/ethical factors |
| Listing the six Rs without applying them | Shows memorisation but not application | Apply each R to the specific product or scenario in the question |
| Forgetting end-of-life impacts | LCA covers the full life cycle | Always discuss what happens when the product is no longer needed |
State TWO environmental impacts of mining metal ores.
Expected answer: (1) Habitat destruction / land scarring from open-pit mines. (2) Water pollution from acid mine drainage or heavy metal contamination.
Explain why a designer might choose FSC-certified timber for a product.
Expected answer: FSC certification guarantees the timber comes from a forest that is managed responsibly (1 mark). This means trees are replanted to replace those harvested, biodiversity is protected, and the rights of local communities and indigenous peoples are respected (1 mark). Choosing FSC timber allows the designer to demonstrate environmental responsibility and meet consumer demand for sustainable products (1 mark).
Compare the environmental impact of using primary (virgin) aluminium versus recycled aluminium for manufacturing drinks cans.
Expected answer: Primary aluminium requires mining bauxite ore, which causes habitat destruction and produces toxic red mud waste (1 mark). The smelting process uses electrolysis, consuming approximately 14,000 kWh per tonne — making it extremely energy-intensive and carbon-intensive (1 mark). Recycled aluminium uses only about 5% of the energy required for primary production, dramatically reducing the carbon footprint (1 mark). Aluminium can be recycled infinitely without loss of quality, so recycling also conserves finite bauxite reserves (1 mark).
A company manufactures children's toys from petroleum-based plastics. Evaluate how the company could reduce its environmental impact by applying the six Rs.
Guidance for your answer:
AQA Exam Tip: For 6-mark questions, aim to make at least 6 distinct, relevant points. Structure your answer with a brief introduction, clear paragraphs for each point, and a conclusion. Quality of written communication matters — use correct spelling, grammar, punctuation, and specialist terminology throughout.
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