The process begins with seeds planted in small cubes of porous volcanic rock. Once the plants begin to grow, they are transferred to vertical aeroponic towers to sit under special lamps with their roots kept constantly moist. The nutrient solution is continuously recycled through the towers; absolutely nothing goes to waste during the process.
The O'Hare Urban Garden, designed by Florida-based firm Future Growing, is intended to preserve both land and resources while educating travelers about the benefits of aeroponics and food. Diners in four of the airport's restaurants can enjoy the ultimate in locally sourced ingredients, harvested just down the concourse.