Most of the water is used for soil-less production, such as tomatoes and peppers planted in a coconut fiber substrate on a bed of channels that collect excess water for reuse. It’s a closed, non-polluting circuit. “We use 30% to 40% less water and nutrients than in traditional production. We’re primarily motivated by environmental factors,” says the farmer. “We can’t even imagine taking a step back.” This individual experience is interesting as an example with the potential for scale-up from a green house in Almeria to the planet Earth. It uses several key technologies—desalination, reuse, and digital management—to meet one of the greatest challenges facing humani-ty: agriculture that can ensure food security for a growing population