The circular economy applies to sustainable waste management by preventing waste, keeping products and materials in use, and regenerating natural systems. In IB ESS Subtopic 7.3 Solid waste, this is core content for both SL and HL.
Unlike the conventional linear economy of “take, make, use, dispose,” a circular system reduces inputs of virgin resources and outputs of waste. Its three principles are eliminating waste and pollution, circulating products and materials, and regenerating nature.
| Circular strategy | Application to waste management |
|---|---|
| Refuse and reduce | Avoid unnecessary products and use fewer materials. |
| Reuse, repair and refurbish | Extend lifespans through repair, resale and remanufacturing. |
| Recycle | Process discarded materials into new production, reducing extraction and landfill. |
| Recover | Obtain energy or materials from residual waste. |
| Regenerate | Compost biodegradable waste, returning nutrients and organic matter to soil. |
These strategies reflect the ESS principle that preventative strategies are generally more sustainable than restorative strategies. Preventing packaging waste usually conserves more energy and material than recycling it after production.
A named example is Kalundborg Symbiosis in Denmark, where companies exchange steam, water and industrial by-products. One organization’s output becomes another’s input, reducing disposal and demand for virgin resources.
A common misconception is that recycling alone creates a circular economy. Recycling still uses energy and may reduce material quality; refusing unnecessary consumption and designing durable, reusable or repairable products are usually more effective.
Circular systems may support environmental justice by reducing pollution around disposal sites. However, repair and recycling schemes must provide safe employment rather than transferring hazardous processing to lower-income communities.