What are the 6 Rs and the circular economy, and how do they guide more sustainable design?
The 6 Rs of sustainable design (rethink, refuse, reduce, reuse, repair, recycle, and the related ideas of recover and rot) and how each is applied to reduce environmental impact, together with the principles of the circular economy and the contrast with the linear take-make-dispose model.
A focused answer to the Edexcel 9DT0 content on the 6 Rs of sustainable design (rethink, refuse, reduce, reuse, repair, recycle) and the circular economy, explaining how each is applied to cut environmental impact versus the linear take-make-dispose model.
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What this dot point is asking
Edexcel wants you to explain the 6 Rs of sustainable design and apply each to reduce environmental impact, and to explain the circular economy and how it contrasts with the linear take-make-dispose model.
The answer
The 6 Rs as a hierarchy
Applying each R
- Rethink: switch from single-use to reusable, or from selling products to a service (for example tool hire), cutting total resource use.
- Refuse: leave out unnecessary packaging, parts or harmful materials.
- Reduce: thin walls, fewer parts, lighter materials, efficient manufacture and lower energy in use.
- Reuse: refillable containers, returnable crates, designing parts to be reused in other products.
- Repair: replaceable batteries and seals, standard fixings, available spares so a product is mended not binned.
- Recycle: choose single, labelled, recyclable materials and avoid hard-to-separate combinations.
The circular economy versus the linear model
The circular economy is the system-level version of the 6 Rs: products are designed from the start to be durable, repairable and recyclable, business models favour reuse and refurbishment, and at end of life materials re-enter the cycle rather than becoming waste.
Examples in context
A coffee chain that switches to a deposit-return reusable cup is using rethink and reuse, far more powerful than recycling disposable cups. Modular phones and laptops with replaceable batteries and standard screws embody repair and reduce, extending product life. Returnable glass bottles and refill stations show reuse in action, and choosing a single labelled polymer makes recycling realistic. At the system level, a manufacturer that refurbishes and resells returned products, recovers materials from old ones and designs new products for disassembly is operating a circular economy rather than the wasteful linear take-make-dispose model, which is exactly the sustainable thinking Edexcel rewards.
Try this
Q1. List the 6 Rs of sustainable design. [2 marks]
- Cue. Rethink, refuse, reduce, reuse, repair and recycle (recover and rot are sometimes added).
Q2. Explain why "reduce" is generally better for the environment than "recycle". [2 marks]
- Cue. Reduce prevents material and energy use in the first place, while recycling still consumes energy to reprocess (and often downgrades) the material after it is made.
Q3. State one feature of the circular economy that the linear model lacks. [1 mark]
- Cue. Materials are kept in use and cycled back into new products (waste is designed out), instead of being used once and disposed of.
Exam-style practice questions
Practice questions written in the style of Pearson Edexcel exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
Edexcel 20196 marksExplain how a designer could apply the 6 Rs to reduce the environmental impact of a single-use plastic drinks cup.Show worked answer →
Extended-response item marked on levels (correct use of several Rs applied to the cup, not just listed).
Rethink: design a reusable cup or a deposit-return scheme so the product model changes from single use to repeated use. Refuse: avoid unnecessary plastic lids, sleeves or packaging that are not needed. Reduce: use less material by thinning the wall or making the cup from a mono-material to ease processing. Reuse: design a sturdy cup the customer keeps and refills, or that the cafe washes and reuses. Repair is limited for a cup, but a reusable mug with a replaceable lid or seal extends life. Recycle: make it from a single, clearly labelled recyclable polymer (or a compostable material that can rot) so it is easy to sort and process.
Markers reward applying at least three or four Rs specifically to the cup with a clear environmental benefit, working up the hierarchy from rethink and reduce (best) rather than relying only on recycling.
Edexcel 20214 marksExplain the difference between a linear economy and a circular economy.Show worked answer →
Award up to two marks for each model explained, with credit for the contrast.
A linear economy follows take, make, dispose: raw materials are extracted, made into products, used and then thrown away as waste, so resources are consumed once and lost to landfill or incineration.
A circular economy is designed to keep materials in use for as long as possible: products are made to be reused, repaired, remanufactured and recycled, so materials cycle back into new products and waste is designed out. It aims to decouple production from continual extraction of new resources.
Markers reward the take-make-dispose description for linear and the keep-materials-in-use, design-out-waste description for circular, with a clear contrast.
Related dot points
- Life-cycle assessment (LCA) and the stages of a product's life (raw material extraction, manufacture, distribution, use and end of life), the concept of the carbon footprint and embodied energy, sustainable material selection and renewable energy, and how designers reduce environmental impact at each stage of the life cycle.
A focused answer to the Edexcel 9DT0 content on life-cycle assessment and the carbon footprint, covering the stages of a product's life, embodied energy, sustainable material selection and renewable energy, and how impact is cut at each stage.
- Designing for maintenance, repair and disassembly, including planned and unplanned obsolescence, modular and repairable design, standardised parts and fastenings, design for disassembly to allow material separation and recycling, and the balance between durability, repairability and cost over a product's life.
A focused answer to the Edexcel 9DT0 content on designing for maintenance, repair and disassembly, covering planned obsolescence, modular and repairable design, standardised parts, design for disassembly for recycling, and the durability-versus-cost balance.
- The social, moral and ethical issues affecting design and manufacture, including fair trade and ethical sourcing, working conditions and labour in global supply chains, the social and ethical responsibilities of designers and companies, inclusive design and consumer protection, and the moral questions raised by consumption, waste and the use of scarce resources.
A focused answer to the Edexcel 9DT0 content on social, moral and ethical issues in design and manufacture, covering fair trade and ethical sourcing, working conditions in global supply chains, designer and company responsibility, inclusive design, and the ethics of consumption and waste.
- Classification of polymers into thermoplastics and thermosetting plastics, their common types, properties and uses, the meaning of recycling codes, and the classification of textiles into natural, synthetic, blended and mixed fibres with their properties and the construction of fabrics by weaving, knitting and bonding.
A focused answer to the Edexcel 9DT0 content on polymers and textiles, covering thermoplastics versus thermosetting plastics, common types and recycling codes, and natural, synthetic and blended fibres with woven, knitted and bonded fabric construction.
Sources & how we know this
- Pearson Edexcel A-Level Design and Technology: Product Design (9DT0) specification — Pearson Edexcel (2017)