A Paris-New York return flight emits 1 to 1.75 tCO2e per passenger, or 11 to 19% of a French person's annual footprint. A Paris-Barcelona return journey represents around 250 kgCO2e. By contrast, a Paris-Lyon TGV journey (500 km) emits around 1.8 kgCO2e per person, thanks to France's low-carbon electricity. For a combustion-engine car, allow 0.2 kgCO2e per km, meaning 160 kgCO2e for one-way Paris-Marseille, compared with 0.05 kgCO2e per km for an electric car in France.
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