If you are taking into account the food consumption of the participants, why stop at one mode? What about the food consumed by the people involved in the produc

If you are taking into account the food consumption of the participants, why stop at one mode? What about the food consumed by the people involved in the production and fuel for cars and scooters? How much would you include? Is it the same for someone sitting at a desk vs someone working on a production line somewhere? Does the existence of a regular job on a car production line encourage larger families? It gets nuts fast which is why it doesn't really make a lot of sense to try to take into account food intake for various transportation modes. If you do manage to convince someone to take their car rather than their bike then how can you be sure they are not going sneak off and get their daily exercise some other way? Normally exercise from walking/biking reduces the need for other exercise. In a sense the extra food cost is free.