How much CO2 does a school bus emit per mile?

Key Details. The climate footprint of a diesel school bus is about 3.3 pounds of carbon dioxide equivalent per mile, more than double the per-mile footprint for a bus powered on the average U.S. electric grid, according to Argonne National Laboratory.



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Mathews points to research showing that trains emit the lowest of CO2 per passenger mile at 177 grams per passenger mile. Buses come in at 299 grams per mile, second-worst only to cars at 371 grams.

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For example, the latest 2022 Defra statistics show that an average petrol car emits 170g of carbon dioxide vs 96g for an average bus, and 35g for national rail per passenger km.

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Thomas Rubin, Marcy Lowe, Bengu Aytekin and Gary Gereffi Debate Public Transit Buses: A Green Choice Gets Greener. The American Public Transit Association claims that public transit saves an estimated 1.4 billion gallons of gas annually, which translates into about 14 million tons of CO2.

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