2 links have been added on this idea.
  1. Rather than hydroponices I think It’s called aeroponics, “a technique in which crops are grown in vertical stacks of plant beds, without soil, sunlight or water.”

  2. I read they could be a misguided fad, despite good intentions. https://globalecoguy.org/no-vertical-farms-wont-feed-the-world-5313e3e961c0