I saw this page some long time ago. I also find it hard to believe actually. One big thing to note is that even though this is on a Stanford domain, it is probably written by a student “Submitted as coursework for PH240”. It is also not peer reviewed, so experts haven’t challenged the methodology or results.
One criticism which comes to my mind is that the manufacturing of an electric or ICE car usually emits several tons of CO2e, while the bicycle manufacturing emits around 100 kg as cited on the website. Usually the car emissions are then calculated by assuming that the car will be used for some 100 thousand kms, thus the per km CO2 emissions are relatively low. This might not be the case for someone using their car only in cities or not owning a car but using train and bus for long distances.
I saw this page some long time ago. I also find it hard to believe actually. One big thing to note is that even though this is on a Stanford domain, it is probably written by a student “Submitted as coursework for PH240”. It is also not peer reviewed, so experts haven’t challenged the methodology or results. One criticism which comes to my mind is that the manufacturing of an electric or ICE car usually emits several tons of CO2e, while the bicycle manufacturing emits around 100 kg as cited on the website. Usually the car emissions are then calculated by assuming that the car will be used for some 100 thousand kms, thus the per km CO2 emissions are relatively low. This might not be the case for someone using their car only in cities or not owning a car but using train and bus for long distances.