I think the main problem is sourcing. If sourcing can be done locally, then delivery costs will automatically plummet. Take vegetables for example. The actual c

I think the main problem is sourcing. If sourcing can be done locally, then delivery costs will automatically plummet. Take vegetables for example. The actual cost of growing the vegetables is negligible compared to the transportation costs of delivering and storing to the end consumer. There is also the added cost of storing. Companies are doing a lot to address the transportation and storage but not doing much to address the sourcing issue. I think one startup in NYC is doing some sort of urban warehouse farming to tackle the sourcing issue.