Whole Earth Curriculum WEC

Lesson 12 — The Circular Economy: Designing Out Waste

Learners explain the idea of a circular economy — designing out waste so materials stay in use — and compare it with the take-make-waste linear economy. They map a product's life cycle onto each model and see that the difference is a design choice, not a fact of nature.

D10 P4: Contextual & Ecological Awareness D10.S4 55 minutes Draft

Objectives

Essential question

How does a circular economy — designing out waste — differ from the take-make-waste linear economy we mostly live in?

linear economycircular economydesign for repairmaterial loopwasteregeneration

Materials

Standard materials

Low-tech / no-cost

Enriched / lab & device

Works in different contexts

Two economy diagrams side by side — a linear economy as a one-way arrow from take to make to use to waste, and a circular economy as a closed loop with arrows for repair, reuse, and return, grayscale-printable
Two economy diagrams side by side — a linear economy as a one-way arrow from take to make to use to waste, and a circular economy as a closed loop with arrows for repair, reuse, and return, grayscale-printable

Lesson 12 — The Circular Economy: Designing Out Waste

Summary

Learners explain the idea of a circular economy — designing out waste so materials stay in use — and compare it with the take-make-waste linear economy. They map a product’s life cycle onto each model and see that the difference is a design choice, not a fact of nature.

Objectives

  • Explain the idea of a circular economy and compare it with a “take, make, waste” linear economy. (D10.S4.10.02)

Connection

A leaf falls, rots, and becomes soil for the next leaf. A plastic bottle, by contrast, is taken from the earth, made in a factory, used for ten minutes, and thrown away — and it does not become anything; it just piles up. Nature runs in loops; most of what humans make runs in a line: take, make, use, waste. A circular economy is the attempt to build our making on the loop instead of the line — to design things so they can be repaired, reused, and returned to the cycle, and waste is designed out from the start. The difference between the two is not a law of nature; it is a choice of design.

Materials

  • Linear/circular diagram
  • Product life-cycle cards

Preparation

  • Copy the linear/circular diagram and the product life-cycle cards.
  • Retrieval: from Grade 9, recall comparing fossil fuels and renewables and analyzing environmental justice (D10.S4.09.01, D10.S4.09.02). Today we add the design question: how a product’s whole life is imagined.
  • Prepare one worked example of mapping a product onto the linear and circular models.

Facilitator note

This lesson is written to the learner (“you”). The idea to land: a linear economy takes, makes, uses, and wastes; a circular economy designs out waste so materials stay in use and nature is regenerated — the difference is a design choice, not a fact of nature. The environment lens is the spine. The technology lens: circular design is a technology question — how a thing is made determines whether its materials can return (S-452). The egalitarian lens: waste rarely stays where it is made — e-waste and plastic waste are dumped on poorer communities and countries, so a linear economy exports harm (S-397, S-216). The global lens: many cultures have long practiced circularity — repair, reuse, shared tools — and the linear model is historically recent, not universal. The ethics lens: treating the Earth as an endless supply and an endless bin is a moral choice, and circularity is a form of care for future people. Anchor the framework: the Ellen MacArthur Foundation defines a circular economy as one where materials never become waste and nature is regenerated (S-452); a product’s life cycle runs from materials to making to use to disposal (S-371); food waste is roughly a fifth of food available to consumers (S-410). Distinguish evidence (what the models do) from values (which we should build). Preview: next lesson evaluates a real sustainability solution for benefits, limits, and fairness.

Procedure

  1. Recall (5 min). From Grade 9: what is a footprint, and how do two different lifestyles compare in the resources they use?
  2. Meet the two economies (10 min). Look at the diagram. A linear economy is take → make → use → waste. A circular economy is a closed loop: make → use → repair → reuse → return, with regeneration of nature built in. Design for repair means building things to be fixed, not thrown away. A material loop keeps a material circulating instead of landfilling it.
  3. Worked example (10 min). Watch one product mapped step by step — a mobile phone: (a) linear path (mined metals → factory → short use → e-waste dump, where toxins can harm people and land, S-397); (b) circular path (designed for repair and return → parts recovered → materials re-enter the loop); (c) what has to change at the design stage, not just the disposal stage.
  4. Guided practice (15 min). In a group, take the product life-cycle cards — a shirt, a bottle, a building. Arrange each onto the linear line, then onto the circular loop. For one, name the single biggest design change that would close its loop.
  5. Independent practice (10 min). In your journal, write: in one sentence, what does “designing out waste” mean, and give one example. If you only restated the definition without an example, mark “not yet.”
  6. Close (5 min). Share one loop-closing change. The lesson: waste is a design choice, and so is its absence.

Differentiation

  • Support: Provide the product cards pre-sorted onto the linear path, and sentence starters for the circular redesign.
  • Extension: Redesign a product so its materials stay in the loop, and name two trade-offs (cost, access, convenience) that make it hard.
  • Expression: Learners may arrange cards physically and have a partner read their reasoning — no step requires writing.

Assessment

  • Formative (peer + self): Can the learner contrast the linear and circular models and name a design change that closes a product’s loop?
  • Portfolio artifact (unit): The linear/circular diagram with one mapped product, as the opening page of the “circular economy” section.

Home connection

With a family member, pick one item your household is about to throw away. Ask: could it be repaired, reused, or returned to a loop — and what would have to be different for that to be easy?

Resources