Dixon Despommier said that most of the technology to complete this plan is already available, and the U.S. government only needs to allocate 0.25% of the money to subsidize U.S. agriculture, or $500 million, to start it This plan.

Vertical farms use soilless solution cultivation and convert sewage into electricity, greatly reducing energy costs and providing more food. Vertical farms can also free up traditional farms to grow more trees, thereby reducing the amount of carbon dioxide in the atmosphere and slowing the global warming process. Moreover, the vertical farm itself is in the city and can be transported directly to where it is needed, thereby saving transportation costs and reducing pollution caused by transportation. The vertical farm is cylindrical in shape, with floors stacked like chips. Each floor is a piece of farmland with a sophisticated irrigation system. All crops will be grown in a controlled environment and checked for maturity using electronic eyes. They can be planted and harvested 365 days a year.

There is already a prototype of a vertical farm and a model provided by Dr. Augustin Rosenthal of the SOA Architectural Studio in Paris. However, although the United States, France and Israel have prototypes of vertical farms, so far, the skyscraper-style vertical farms envisioned by scientists are still out of reach, and people cannot yet buy agricultural products produced by vertical farms on the market.

Planners in some of the world’s largest cities have shown interest in “vertical farming.” But so far, "vertical farming" is still in the conceptual stage, and there is no established application model. There will be some obstacles in its implementation. The biggest obstacle is the source of water and energy, the two necessary conditions. "Vertical agriculture" requires a complete urban sewage recycling and energy supply system as a supporting system. In addition, economic considerations have become the main reason why some scholars are opposed to this. They believe that the costs of "vertical farming" will exceed profits. After all, profits are always the priority factor for investors. So, while the concept of "vertical farming" is alluring, it still seems far from reality.