Reduce, Reuse, Recycle

The Earth's finite resources are being consumed at an unsustainable rate. One of the most important ways we can address this is by applying the principles of reduce, reuse and recycle to the products and materials we use. This lesson covers these concepts as required by the AQA GCSE Chemistry specification, with a focus on the chemistry behind recycling metals, glass and plastics.

---

The Waste Hierarchy

The waste hierarchy ranks waste management options from most to least desirable. The most sustainable approach is to reduce the amount of material used in the first place.

graph TD
    A["1. REDUCE<br>(Most desirable)<br>Use less material"] --> B["2. REUSE<br>Use the product again<br>for the same or different purpose"]
    B --> C["3. RECYCLE<br>Process materials to<br>make new products"]
    C --> D["4. ENERGY RECOVERY<br>Burn waste to<br>generate energy"]
    D --> E["5. LANDFILL<br>(Least desirable)<br>Bury waste in the ground"]
    style A fill:#2e7d32,stroke:#1b5e20,color:#ffffff
    style B fill:#43a047,stroke:#2e7d32,color:#ffffff
    style C fill:#66bb6a,stroke:#43a047
    style D fill:#ffb74d,stroke:#e65100
    style E fill:#e53935,stroke:#b71c1c,color:#ffffff

---

Reduce

Reducing means using fewer resources and producing less waste in the first place. This is the most effective option because it avoids environmental impact entirely.