Vertical farming, the best solution to support an ever growing population or just a scam?
IMHO it has a lot of potential but not being able to grow grains really is something that should be tackled sooner rather than later. But I could see this being used by self sustaining communities to provide lots of food while using very little space. And it's technically more environmentally friendly than just using vast stretches of land to produce the same amount of food.
The type of vertical farms most people are talking about are under-ground or on roof-tops and occupy next to no space that could otherwise be used for housing.
The roads required for trucks take up more space in cities than those vertical farms would.