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Which statement is true regarding the fuel consumption per kilometre for a petrol-driven car with a catalytic converter after a cold start?

The short distances cause the most pollution per km. […] Petrol consumption and carbon dioxide emissions are 35% higher in the first 5 km, as a cold engine requires a “richer” fuel mix. During the first 5 km, the average car will consume as much as 0.14 litres/km.” (Swedish Society for Nature Conservation)

Note that the question is asking about the consumption per kilometre, i.e. an average. Over a longer distance, you will normally use more fuel overall, but not in terms of average consumption per kilometre.

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