Urban vertical farms will create huge ecological benefits for the surrounding areas and even the whole earth. Vertical farms will rely on hydroponic organic farming techniques, which means that pesticides and synthetic fertilizers are not needed, and pollutants will not be injected into waterways. Vertical farms will produce grains, vegetables and fruits efficiently. There are many farm buildings in the city, eliminating the extensive use of heavy machinery and agricultural equipment. Irrigation water may come from treated rainwater, and the recycling and effective utilization of water can greatly alleviate the water crisis. Because the vertical farm is located in the center of the city, traffic and related environmental impacts are eliminated. All kinds of crops will be closely monitored to obtain accurate growth conditions, thus increasing production. Indoor planting will not be affected by natural disasters such as floods, droughts and hurricanes. Green high-tech work will become the work of growers, researchers, technicians, suppliers and more people. In order to build such a high-tech farm, a large number of sustainable technologies will be comprehensively utilized. These technologies are currently in use, but not all of them are integrated into one site for comprehensive utilization. Rainwater will be treated for irrigation, and then combined with water recovery system to collect unused water through air culture and hydroponics. The environmental conditions of each crop will be strictly controlled, so as to ensure the growth of crops to the maximum extent and minimize the use of water and nutrients. The waste produced by crops is either composted or mixed with animal manure as fuel for buildings. Energy will come from renewable resources such as solar energy and wind energy, while energy-saving building technology will reduce energy demand, and ideal buildings can create more energy than needed. Crop production in vertical farms can be carried out all year round, and the productivity of indoor planting area 1 mu is equivalent to the productivity of outdoor area of 4 to 6 mu or more. All kinds of vegetables, fruits and grains will be planted on the farm, as well as dairy products, poultry, fish and pigs. According to vertical farm researcher Debomia, a vertical farm is enough to feed 50,000 people.