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Course Library · Lesson 6 of 6
Life · Guided lesson

Compare and revise the complete waste plan

About 13 minutes · 3 reading + 10 practice and checks
Time includes reading, practice, and questions. Extra videos or further study are optional.
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A fictional household waste audit separating prevention, reuse, local recycling acceptance and special-disposal questions with checked quantities.

Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.

What to include

  • Record a seven-category stream with unit and period.
  • Calculate prevention and remaining material without duplicate counts.
  • Split suitable cardboard reuse from remaining cardboard.
  • Apply the supplied local guide and balance every route.
  • Write special-provider questions without handling items.
  • Compare and revise the complete plan with honest status labels.

Review and revise

Use these criteria to check your work and choose what to improve.

  • Method: applies the course-specific rules to the supplied cases with visible intermediate work.
  • Accuracy: results agree with the stated facts, units, boundaries and independent checks.
  • Reasoning: explains why the result follows and identifies a limitation or unresolved question.
  • Transfer: completes changed cases and revises the final project when a relevant assumption changes.
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Before you begin

The idea in everyday life

Use the original 10 kg week. Without prevention, planned routes with the same 0.5 kg box reuse are: reuse 0.5 kg; curbside paper/cardboard/bottles 5.5 kg; film+food residual 3 kg; special questions 1 kg. Updated prevention of paper 1 kg and food 0.5 kg leaves 8.5 kg: reuse 0.5; curbside 4.5; residual 2.5; special questions 1 kg.

The idea

A final waste plan separates avoided material, existing reused material, accepted collection proposals, residual material and unresolved special routes. Compare like periods and report the status of each number. Do not equate a proposed mass shift with actual collection, universal environmental impact or automatic carbon savings.

Follow along

Compare and revise the complete waste plan — worked practice

A final waste plan separates avoided material, existing reused material, accepted collection proposals, residual material and unresolved special routes. Compare like periods and report the status of each number. Do not equate a proposed mass shift with actual collection, universal environmental impact or automatic carbon savings.

Use the original 10 kg week. Without prevention, planned routes with the same 0.5 kg box reuse are: reuse 0.5 kg; curbside paper/cardboard/bottles 5.5 kg; film+food residual 3 kg; special questions 1 kg. Updated prevention of paper 1 kg and food 0.5 kg leaves 8.5 kg: reuse 0.5; curbside 4.5; residual 2.5; special questions 1 kg.

  1. 1. 1. Compare

    Check both route balances and prevention boundary.

    You should see: Old 0.5+5.5+3+1=10; new 0.5+4.5+2.5+1=8.5; 1.5 kg avoided.

  2. 2. 2. Interpret

    Explain why a lower recycling mass need not be worse here.

    You should see: One kilogram of paper was prevented before collection, not lost from the record.

  3. 3. 3. Revise

    Suppose a verified fictional separate film drop-off accepts the 1 kg film, distinct from curbside.

    You should see: New residual 1.5 kg; separate film drop-off 1 kg; curbside remains 4.5 kg.

  4. 4. 4. Report

    Assemble route table, guide assumptions and unresolved provider questions.

    You should see: All are proposed fictional quantities, not receipts or real disposal outcomes.

Now change one thing

Changed fictional acceptance: the separate film drop-off accepts only 0.5 kg of the 1 kg film; the rest remains residual. Food residual remains 1.5 kg, and other routes are unchanged. Enter the new residual mass in kg.

Your work

What to finish

A final before/after waste packet with balanced routes, revised guide and unresolved provider questions.

Common mistake

Watch for this

The fictional record demonstrates allocation and revision. Real collection outcomes and environmental impact require additional evidence beyond this paper plan.

How can I tell I understand it?

Reconcile a new separate route without double-counting diversion or claiming a performed collection.

Try 3 questions

Quick knowledge check

Answer all 3 questions. Get at least 2 right and the lesson completes automatically.

Not yet passed

You’ll get an explanation for each answer. Signed in? Your results save to your account.

1Why did curbside mass fall from 5.5 to 4.5 kg?
2What happens to residual mass when the supplied separate film route is added?
3What outcome can this final packet establish?
0 of 3 answeredApply the lesson to a short question, then review the explanation.
6
Finish this lesson

Pass the check. We’ll save the progress.

Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.

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Tools, templates, and lesson sources

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Sources and further reading

Explore the references behind this lesson.

EPA: program-specific recycling questions
Source & access notes · checked 2026-10-01

Web open/search showed the official page, its topic heading and relevant concept description. This is a content/source check, not a provider endorsement.

Access: Official page retrieved with the web reader on 2026-10-01; interactive tools and videos were not certified by retrieval.

Reuse: Original fictional teaching cases, calculations, questions and examples; link and short factual paraphrase only. No copied source exercises or illustrations.

EPA: reduction and reuse actions
Source & access notes · checked 2026-10-01

Web open/search showed the official page, its topic heading and relevant concept description. This is a content/source check, not a provider endorsement.

Access: Official page retrieved with the web reader on 2026-10-01; interactive tools and videos were not certified by retrieval.

Reuse: Original fictional teaching cases, calculations, questions and examples; link and short factual paraphrase only. No copied source exercises or illustrations.

EPA: electronics and lithium-ion recycling boundaries
Source & access notes · checked 2026-10-01

Web open/search showed the official page, its topic heading and relevant concept description. This is a content/source check, not a provider endorsement.

Access: Official page retrieved with the web reader on 2026-10-01; interactive tools and videos were not certified by retrieval.

Reuse: Original fictional teaching cases, calculations, questions and examples; link and short factual paraphrase only. No copied source exercises or illustrations.

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