The majority of the world’s population will live in cities by the end of this century, and traditional farm space is dwindling. Architects and designers have to think outside of the box to come up with the next generation of farms to feed everyone. The Plantagon is a vertical farm concept that’s enclosed in a dome, with the growing surface consisting of a large spiral inside the dome. Designed by Swedish-American company Plantagon, the first of these spectacular farms is expected to go into production within three to five years.