Logically that would make a lot of sense, if we were to design things in such a way that products are only shipped to their local urban areas. However, the mode

Logically that would make a lot of sense, if we were to design things in such a way that products are only shipped to their local urban areas. However, the modern day system has given rise to such absurdities as fruit grown in South America being shipped to Asia for packaging, and then shipped to North America for consumption. It's not that the entire system is amazingly efficient, it's that it's simply been possible because energy has been very cheap this last century. The food system will have to adapt one way or another (and I think we will), but it will probably end up being more human-labor intensive and local. Relating to energy, one of the coming issues we will need to solve is fertilizer supply. Modern agriculture heavily depends on natural gas (via Haber-Bosch) to juice yields alongside genetic engineering. This isn't great for long-term soil health either, we just haven't been doing it long enough to see the effects of soil depletion.