Comparing responses means placing two approaches side by side against the same criteria. A neutral comparison describes documented effects, states limits and leaves personal opinion out. This is the skill behind most “compare” and “assess” command words.
It follows explaining the mechanism because you must know the cause being targeted before judging a response.
What are the two main response types?
Mitigation tackles causes, such as reducing emissions or protecting forests that store carbon. Adaptation reduces harm from change, such as raised buildings, flood barriers or drought-tolerant crops.
Mitigation effects are shared worldwide and appear slowly. Adaptation effects are usually local and can appear sooner. Those differences are useful criteria.
How do you compare step by step?
- Choose 3 to 4 criteria: scale, time, cost, who is affected, and limits.
- Describe each response against the same criteria, in the same order.
- Use documented effects, with numbers where supplied.
- State a limit for each response.
- Judge only if asked, and tie the judgement to your criteria.
Worked example
Both schemes are invented for practice.
| Scheme A: solar farm | Scheme B: coastal flood wall | |
|---|---|---|
| Type | Mitigation | Adaptation |
| Cost | 30 million currency units | 20 million currency units |
| Documented effect | 12,000 tonnes of CO₂ avoided per year | 8,000 residents protected from flooding |
Cost per unit of effect, A: 30,000,000 ÷ 12,000 = 2,500 units per tonne per year.
Cost per unit of effect, B: 20,000,000 ÷ 8,000 = 2,500 units per resident protected.
The two numbers are equal, but the units are different. A tonne of avoided carbon dioxide and a protected resident are not the same kind of benefit, so the figures cannot rank the schemes.
Neutral sentence: “Scheme A reduces emissions that affect the whole climate over a long period, while Scheme B reduces flood risk for a specific population. They address different problems, so the choice depends on which criterion a decision-maker prioritises.”
The mistake to watch for
Mistaken answer: “Scheme B is better because it costs less.”
Cost alone is one criterion, and the schemes do different jobs. Lower cost does not show a better outcome.
The correction is to name the criterion and its limit: “On total cost, B is lower, but the benefits are of different kinds, so cost alone cannot decide which is better.”
Check yourself
1. Is a mangrove planting scheme to reduce wave damage mitigation or adaptation?
Show answer
Adaptation, because its main purpose is to reduce harm from waves. It can also store carbon, which is a mitigation benefit, so a careful answer notes both.
2. A scheme costs 18 million units and protects 6,000 residents. Find the cost per resident.
Show answer
18,000,000 ÷ 6,000 = 3,000 units per resident. Check: 3,000 × 6,000 = 18,000,000.
3. Give two criteria for comparing responses that are not cost.
Show answer
Any two of: scale of the area helped, time before effects appear, who benefits, risks or side effects, how long the effect lasts.
Where this leads next
Finish the module with the limits of rankings and local forecasts. The mistake log and retest queue helps you keep track of wording errors.
Comparisons improve when your criteria are challenged. A teacher in online one-to-one Geography tuition can question each sentence in your own answers.