“but it doesn’t plant food or ship it to your grocery store shelves.”
Um, trucks and tractors can and do run on NG. It is just cheaper right now to use diesel, but there is no reason why fleets can’t run on NG.
There are delivery trucks in Colorado that run on NG.
Obviously there IS a reason why they don’t, because they don’t. Bizarre little demonstration exceptions don’t redefine reality.
Go on down to walmart and ask them what kind of trucks bring them food.