A good idea, but it's not possible.people can't grow everything that they have to eat. We have to rely on producers, it's always been that way. I look at it this way, we've got to die of something. Who wants to sit in a chair, because we can't do anything else,waiting for the end to come.
They have to put salt in to preserve it.
It would be a good idea to be ecologically aware though. Of course, we all have to die of something, but it would be nice not to mess up the globe so that our children can enjoy fresh air, healthy foods and live by sound principles.