Matters of Scale - Carbon Tracks

Estimated carbon emissions per passenger-mile traveled (grams of CO2):

 

Automobile 130-390
Comercial jetliner 180-280
Bus
110-190
Train
100-180
 

###

Walking (if all calories came from top sirloin) 900-1,600
(from ground beef)
500-1,500
(from 2% milk)
200-400
(from apple)
50-100
(from typical U.S. diet) 160
(from vegan diet) 30

###

Cycling (all calories from top sirloin)
500-900
(from ground beef)
300-500
(from 2% milk)
100-200
(from typical U.S. diet)
100
(from vegan diet)
20

 

SOURCES: Vehicles: estimates compiled by Neil Kolwey of E-Source from U.S. Environmental Protection Agency and World Resources Institute data. Walking and cycling: Pacific Institute. Note: Numbers are selected estimates and heavily assumption-dependent.

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