In 2050 the world population will be around 10 billion inhabitants, of which the majority will live in urban areas.
The production of food in urban areas, using conventional forms, is not easy. There is a huge need to create alternatives that allow the production of food in these places, in a safe, fair, accessible and environmentally friendly way.
Crops grown without soil, such as hydroponics, are a sustainable way of producing food, requiring less use of space, being suitable for the production of food in urban environments.
In these systems, inorganic nutrients are supplied to crops through irrigation water, with the nutrients dissolved in standardized concentrations. The roots of the plants can grow on a substrate irrigated with the nutrient solution or else be in direct contact with the nutrient solution without any solid phase.
Nowadays, systems for growing food without soil are closed, in which the irrigation water is reused.