WSJ story about vertical farming vision from Sweden.
Goal is to make food happen while farmland disappears (to urbanization and harsh climate change) and to be able to do so year-round in a northern clime. Then there's the local food angle (less transpo, etc.).
Critics say the economics won't work at this time, especially on the energy, but advocates say this is a long-term solution that will become economical as climate change raises the price of doing business in many parts of the world, triggering global shifts in food production and - presumably - migration.
Interesting idea. I think the notion may make some sense regarding vegetables, but I don't see either fruits (maintenance of trees too tricky) or grains (just can't get the volume).
On vegetables, they (and fruits) account for only 3% of US farmland use, which is overwhelmingly given over to wheat, corn and soybeans (and a few others). So, given that reality, vertical farming for major urban areas may make economic sense on a major scale sometime later this century.