Key Idea: HL Topic 6.8 extends the circular economy topic with deeper analysis of implementation challenges, quantitative assessment of circularity metrics, and evaluation of regulatory and market drivers that influence the transition from linear to circular business models.
🗑️ Linear logic: **Linear model —** take, make, dispose. **Resources used once**. **More waste and environmental damage**. **Short-term simplicity, long-term pressure**.
♻️ Circular logic: **Circular model —** reuse, repair, recover, recycle. **Materials kept in use for longer**. **Less waste and stronger sustainability**. **More complex but potentially more resilient**.
✅ Why circular models matter: Lower waste and resource use. Potential long-term cost savings. Better reputation and stakeholder appeal. Helps meet regulation and sustainability pressure.
⚠️ Main challenges: High implementation cost. Operational complexity. Customer adoption may be slow. Not every circular model suits every product.
HL answers should not just define circularity. They should explain which circular model fits the case, why it fits, what implementation problems may arise, and whether the strategy is commercially realistic.
Evaluation tip: a circular strategy may be strategically strong in the long run but still difficult in the short run because of redesign costs, retraining, customer habits or supply chain disruption.
Important: Common trap: students describe a circular model correctly but fail to explain why it is suitable or unsuitable for the specific product or business.
- Identify the relevant circular or sustainability model
- Explain how it works
- Apply it to the specific product or business
- Judge whether it is suitable and realistic
- Weigh long-term gains against short-term costs
- Finish with a clear recommendation if required