Sustainability & Environmental Considerations

This lesson examines how designers and manufacturers can reduce the environmental impact of their products, covering the full product life cycle. This is a core topic in AQA GCSE Design and Technology (8552), Section 3.1.1, and will appear across both Paper 1 and the NEA (Non-Exam Assessment).

---

What Is Sustainability?

Sustainability means meeting the needs of the present without compromising the ability of future generations to meet their own needs. In Design and Technology, this means designing products that:

• Use fewer raw materials
• Consume less energy during manufacture and use
• Generate less waste at end of life
• Can be recycled, reused or repaired

---

The 6 Rs of Sustainability

AQA expects you to understand and apply the 6 Rs framework when evaluating products.

R	Meaning	Example
Reduce	Use less material or energy	Making a drinks can with thinner aluminium walls
Reuse	Use the product or its parts again	Glass milk bottles returned for refilling
Recycle	Process waste material into new raw materials	Melting down PET bottles to make fleece fabric
Refuse	Choose not to buy or use unsustainable products	Declining single-use plastic bags
Rethink	Consider whether the product is necessary or could be designed differently	Replacing physical CDs with digital streaming
Repair	Fix a product rather than discarding it	Replacing a broken zip on a jacket rather than buying a new one

AQA Exam Tip: When a question asks you to evaluate a product's sustainability, try to mention at least three of the 6 Rs, with specific examples related to the product shown. Generic answers such as "they could recycle it" without explaining what material or how will not gain full marks.

---

Life Cycle Assessment (LCA)

A Life Cycle Assessment analyses the environmental impact of a product across its entire life, from raw material extraction to disposal. AQA requires you to understand the four stages:

Stage 1: Raw Material Extraction

• Mining metals, felling trees, drilling for oil (to make plastics)
• Environmental impacts: habitat destruction, air and water pollution, energy consumption

Stage 2: Manufacturing and Processing

• Shaping, machining, assembling, finishing
• Impacts: energy use (often from fossil fuels), waste material (offcuts, swarf), emissions, chemical pollutants

Stage 3: Use and Maintenance

• Energy consumed during use (e.g. electricity for a kettle)
• Consumables needed (e.g. replacement filters, batteries)
• Repair and maintenance requirements

Stage 4: End of Life (Disposal)

• Landfill — cheapest but worst for the environment; materials are lost
• Incineration — reduces volume but produces CO₂ and toxic gases
• Recycling — recovers materials but requires energy for collection and processing
• Composting — suitable for biodegradable materials (e.g. cardboard, bioplastics)

The diagram below shows the full circular life cycle: a sustainable product is designed so that materials flow back into reuse, repair or recycling rather than ending in landfill.

graph LR
    A["1. Raw material\nextraction"] --> B["2. Manufacturing\n& processing"]
    B --> C["3. Distribution\n& retail"]
    C --> D["4. Use &\nmaintenance"]
    D --> E["5. End of life"]
    E --> E1["Repair"]
    E --> E2["Reuse"]
    E --> E3["Recycle"]
    E --> E4["Landfill /\nincinerate"]
    E1 --> D
    E2 --> C
    E3 --> A

LCA Comparison Table

Stage	Plastic Carrier Bag	Cotton Tote Bag
Raw materials	Oil extraction	Cotton farming (pesticides, water)
Manufacture	Low energy, lightweight	Higher energy, dyeing chemicals
Use	Single use (typically)	Reused hundreds of times
End of life	Difficult to recycle; persists in environment	Biodegradable; can be composted

AQA Exam Tip: LCA questions often include a twist — for example, a cotton tote bag has a higher initial impact than a plastic bag, so it must be reused many times (often cited as 130+ times) to have a lower overall impact. Examiners reward students who recognise this complexity rather than giving a simplistic answer.

---

Planned Obsolescence

Planned obsolescence is the deliberate design of a product so that it becomes outdated or non-functional after a certain period, forcing the consumer to buy a replacement.

Type	Description	Example
Technical obsolescence	Components fail after a set time	A printer designed to stop working after a fixed number of pages
Style obsolescence	Products are made to look unfashionable	Annual smartphone designs that make last year's model seem dated
Functional obsolescence	Software updates no longer support older hardware	An operating system update that slows older tablets

Why Is This a Problem?

• Increases electronic waste (e-waste) — the fastest-growing waste stream globally
• Depletes finite resources (rare earth metals in electronics)
• Many discarded products end up in landfill in developing countries, causing pollution

Design Solutions

• Modular design — parts can be individually replaced (e.g. Fairphone)
• Timeless aesthetics — avoiding trend-driven design
• Open-source software — allowing community updates even after manufacturer support ends
• Right to repair legislation — giving consumers access to spare parts and repair guides

---

Carbon Footprint

A product's carbon footprint is the total amount of greenhouse gases (measured in CO₂ equivalents) produced across its life cycle. Designers can reduce carbon footprint by:

• Sourcing local materials to reduce transport emissions
• Using renewable energy in manufacturing
• Designing for lightweight construction to reduce transport impact
• Choosing materials with lower embodied energy

---

Summary

• Sustainability is about balancing present needs with future resource availability.
• Apply the 6 Rs (Reduce, Reuse, Recycle, Refuse, Rethink, Repair) to evaluate and improve products.
• LCA examines environmental impact across four stages: raw materials, manufacturing, use and disposal.
• Planned obsolescence drives consumption and waste; modular and repairable design offers a counter-approach.
• Reducing a product's carbon footprint requires action at every life cycle stage.

AQA Exam Tip: Sustainability is a cross-cutting theme that connects to almost every topic in D&T. In your NEA, explicitly addressing sustainability in your design brief and evaluation will demonstrate higher-level thinking.

---

The Circular Economy