Macro wrote:
Two guys like me in their hammock allow us to feed a third ...
In terms of the sports / non-sports comparison ... if the first goes to work by bike or running, and the second by car or public transport, the savings made by the first will no longer be in kcal but in kW!
In addition, given that it is not the number of calories expended that counts, but their origins ... if they come from a meat diet, their carbon impact will be many times greater than that of plants ...
Ecologically the benefit will always go to vegetarian food.
In short, by preventing two billion joggers from running all day long, we feed one billion people
Most joggers are people who run to lose weight, most are more of a diet, hence the error in your calculations.
And as long as we have to calculate the ecological footprint of our furry and feathered friends, why not blame the ecological problems on aliens as long as we have to do it!