Office for Climate Education
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The carbon footprint of a Paris–Marseille trip

6ème5ème30 minAnglais

Proposé par Camille Démo ✓, Collège Jean-Moulin, Paris · publié le 17 septembre 2026

Compare the CO₂ emissions of the train, the car and the plane using percentages and proportionality.

Énoncé

For a trip from Paris to Marseille (about 750 km), the average emissions per passenger are:

  • High-speed train (TGV): 1.8 kg of CO2

  • Car (1 person): 145 kg of CO2

  • Plane: 190 kg of CO2

  1. How many times more does the car emit than the train?

  2. Express the emissions of the train as a percentage of those of the plane.

  3. A family of 4 travels by car. Calculate the emissions per person and compare with the train.

  4. By what percentage do emissions fall if the plane is replaced by the train?

Voir le corrigé

  1. 145 / 1.8 ≈ 80 times more.

  2. 1.8 / 190 ≈ 0.95 %.

  3. 145 / 4 ≈ 36 kg per person, still 20 times more than the train.

  4. (190 − 1.8) / 190 ≈ a 99 % drop.

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