What makes a material or resource sustainable, and how do finite resources, renewable resources and recycling differ?
The sustainability of materials and resources: finite versus renewable resources, sustainable timber (FSC), recycling of polymers and metals, the WEEE directive, and how material choice affects a product's environmental impact.
A focused answer to OCR A-Level Product Design on the sustainability of materials and resources: finite versus renewable resources, sustainable timber and the FSC, the recycling of polymers and metals, the WEEE directive, and how material choice affects environmental impact.
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What this dot point is asking
OCR wants you to distinguish finite from renewable resources, explain sustainable timber and the FSC, compare the recycling of polymers and metals, know the WEEE directive, and judge how material choice affects a product's impact. Material choice is one of the strongest levers a designer has over sustainability.
Finite versus renewable resources
The exam trap is to call metals renewable because they can be recycled; the ore is finite, and recycling only extends its use, it does not replace the resource.
Sustainable timber and the FSC
Recycling polymers and metals
How material choice affects impact
Material choice affects impact through the resource (finite or renewable), the embodied energy of extraction and processing, the product's recyclability at end of life, and its durability in use. A good answer weighs these against the trade-offs: a sustainable material may be dearer, weaker, less available or harder to manufacture, and recycled material may be lower in quality.
Exam-style practice questions
Practice questions written in the style of OCR exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
OCR 20204 marksExplain the difference between a finite resource and a renewable resource, and give one named example of each used in product design.Show worked answer →
A Component 01 short-answer question. Marks for each definition and example.
Award marks for: a finite (non-renewable) resource is one that exists in a limited amount and will eventually run out because it is not replaced on a human timescale; examples are crude oil (the source of polymers) and metal ores such as iron ore, copper and aluminium (bauxite). A renewable resource is one that can be replaced naturally at the same rate or faster than it is used, if managed responsibly; the key example in product design is timber from sustainably managed forests, and also natural materials such as cotton, wool and other plant fibres.
A common dropped mark is calling all metals renewable because they can be recycled; the ore is finite, even though recycling extends its use. Recyclability is not the same as renewability.
OCR 20218 marksDiscuss how material choice affects the sustainability of a consumer product. Refer to renewable resources, recycling and the FSC, and evaluate the trade-offs a designer faces.Show worked answer →
A Component 02 levels-of-response question (AO3), marked by levels.
A top-level answer links material choice to sustainability and weighs trade-offs. Choosing a renewable material (FSC-certified timber, which guarantees the timber came from a responsibly managed forest) over a finite one (oil-based polymer) reduces reliance on finite resources, provided the forest is genuinely well managed. Choosing recyclable materials and designing for recovery matters: thermoplastics can be reheated and remoulded so they recycle relatively well, thermosets cannot; metals can be melted and reprocessed many times, so they are highly recyclable if sorted. The WEEE directive requires electrical waste to be collected and recycled, so electronic products should be designed for recovery. The evaluation should weigh the trade-offs: a sustainable material may be dearer, weaker, less available or harder to manufacture; recycled material may have lower quality; and recyclability depends on consumer behaviour and infrastructure. A justified conclusion is that material choice strongly affects sustainability, but the designer must balance environmental gain against cost, performance and manufacturability.
Markers reward weighing the environmental benefit against cost and performance with a judgement.
Related dot points
- The 6 Rs of sustainable design (rethink, refuse, reduce, reuse, repair, recycle), design for disassembly, the circular economy and cradle to cradle, and how designers apply them to reduce a product's environmental impact.
A focused answer to OCR A-Level Product Design on the 6 Rs of sustainable design (rethink, refuse, reduce, reuse, repair, recycle), design for disassembly, the circular economy and cradle to cradle, and how designers apply them to cut a product's environmental impact.
- Life cycle assessment (LCA): the stages of a product's life (raw material extraction, processing, manufacture, packaging and transport, use, end of life), carbon footprint, embodied energy, and how an LCA guides design decisions to cut impact.
A focused answer to OCR A-Level Product Design on life cycle assessment: the stages from raw material extraction through processing, manufacture, transport, use and end of life, carbon footprint and embodied energy, and how an LCA guides design decisions to reduce environmental impact.
- Social, moral and ethical issues in product design: planned and built-in obsolescence, fair and ethical trade (Fairtrade), worker conditions and globalisation, inclusive design, consumer culture, and the designer's social responsibility.
A focused answer to OCR A-Level Product Design on the social, moral and ethical issues in design: planned and built-in obsolescence, Fairtrade and ethical trade, worker conditions and globalisation, inclusive design, consumer culture, and the designer's social responsibility.
- The classification of materials used in product design: papers and boards, natural and manufactured timbers, ferrous and non-ferrous metals and alloys, thermoplastic and thermosetting polymers, and composites, with the defining features of each category.
A focused answer to OCR A-Level Product Design on the classification of materials: ferrous, non-ferrous metals and alloys, thermoplastic and thermosetting polymers, hardwoods, softwoods and manufactured boards, papers and boards, and composites, with the defining feature and a named example of each category.
- The selection of materials and standard stock forms (sheet, bar, rod, tube, extrusion, granules, pre-formed sections) for a product, weighing functional, aesthetic, economic, manufacturing, availability and environmental factors.
A focused answer to OCR A-Level Product Design on selecting materials and stock forms: the functional, aesthetic, cost, availability, manufacturing and environmental factors, the standard stock forms (sheet, bar, rod, tube, extrusion, section, granules), and how a designer justifies a material choice for a product.
Sources & how we know this
- OCR A Level Design and Technology (H404-H406) specification — OCR (2017)