The global population is constantly increasing. The area of available arable land is constantly decreasing. The scale of urbanization is increasing, and the transportation distance and transportation cost of food are also rising accordingly. In the next 30 years, the ability to provide adequate food will become a major challenge. Traditional agriculture will not be able to provide sufficient healthy food for future urban residents. In order to meet the demand for food, we need better new planting systems.

Urban farms and indoor vertical farms provide good examples for solving such problems. We will grow tomatoes, fruits, lettuce, etc. in big cities. These plants mainly need water and light supply. Compared with traditional agricultural solutions, indoor planting can greatly increase energy efficiency, so as to finally cultivate vegetables and fruits in metropolises around the world.