Using less fossil fuel per whatever (tonnes shipped) isn't always the same as using less fossil fuels, especially if you end up shipping more tonnes or whatever is applicable to a situation where more efficient use of a fossil fuel is being discussed.
Using less fossil fuel per whatever (tonnes shipped) isn't always the same as using less fossil fuels, especially if you end up shipping more tonnes or whatever is applicable to a situation where more efficient use of a fossil fuel is being discussed.