IPA FE Subject A 2025 Question 20
A question IPA Japan published in 令和７年度 基本情報技術者試験 科目A 公開問題 問20, translated into English. ITPEC is based on the same exams.
Which of the following is an explanation of carbon footprint?
Explanation
Life-cycle greenhouse gas emissions converted into CO₂ and shown on the product or service — the carbon footprint makes a product's climate impact visible.
The carbon footprint of a product adds up the greenhouse gases emitted at every stage of its life cycle: procurement of raw materials, manufacturing, distribution, use, and disposal or recycling. Gases other than CO₂, such as methane and nitrous oxide, are converted into the amount of CO₂ with the same warming effect, and the total is labelled on the product or service. Consumers can then compare products, and companies can see at which stage to cut emissions.
Answer (b)
Why not others:
- •(a) — bringing to zero the emissions minus what is absorbed and removed is carbon neutrality (net zero)
- •(c) — limits on carbon monoxide, nitrogen oxides and hydrocarbons from car engines are vehicle exhaust emission standards, about air pollution rather than greenhouse gases
- •(d) — a mechanism for tracking where products are made, distributed and sold is traceability
Key rule: Carbon footprint: life-cycle emissions in CO₂ terms shown on the product; carbon neutral: net emissions brought to zero; traceability: tracking a product's origin and route.
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This question comes from the past questions IPA Japan publishes, translated into English by ITPEC Practice. ITPEC Practice is an independent study tool and is not affiliated with IPA or ITPEC. See the original paper (PDF) or Report an issue.