Write one difference between biodegradable and non-biodegradable wastes. List two impacts of each type of the accumulated waste on environment if not disposed off properly.
Generated by claude-sonnet-4-6 · 2026-06-15 06:43 · grounding rag
Model Answer
Difference:
Biodegradable wastes are broken down by biological processes (microorganisms), e.g., vegetable peels. Non-biodegradable wastes cannot be broken down biologically and persist in the environment, e.g., plastics.
Impacts of biodegradable waste:
- Decomposition produces foul smell and acts as a breeding ground for disease-causing organisms.
- Excessive decomposition can cause soil and water pollution, depleting oxygen in water bodies.
Impacts of non-biodegradable waste:
- Causes biological magnification — harmful chemicals accumulate in higher trophic levels.
- Persists in the environment for a long time, harming organisms and polluting soil and water.
Source: Chapter 13, Section 13.2.2
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Explanation
- The examiner expects one clear difference (1 mark), two impacts of biodegradable (1 mark), and two impacts of non-biodegradable (1 mark) — total 3 marks.
- Don't just say "causes pollution" — be slightly specific (soil, water, biological magnification).
- The term biological magnification scores well for non-biodegradable impacts as it is a key term from this chapter.
- Keep each point concise; one line per impact is sufficient.