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Carbon footprint of travel per kilometer

The carbon footprint of travel is measured in grams of carbon dioxide-equivalents per passenger kilometer. Thisincludes the impact of increased warming from aviation emissions at altitude.

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Data source: UK Government, Department for Energy Security and Net Zero (2022) – Learn more about this data

Note: Official conversion factors used in UK reporting. These factors will vary across countries depending on energy mix, transporttechnologies, and occupancy of public transport. Data for aviation is based on economy class.

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Related: Which form of transport has the smallest carbon footprint?

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