Turning a dry and hot desert into a green landscape is now the stuff of dreams or fairy tales. In practice, large amounts of water would be needed to make such a change. But where in the desert can one find such huge quantities of water? From the air using the Sun! Even desert air contains a small amount of water vapour. But the climate conditions of the desert do not allow for an easy extraction of water from the air with the use of a conventional cooler, that would condense the water with low temperature. That can be done in the European climate conditions, but not in a barren area suffering from water shortage.

A device that can transform the dry desert into an oasis through targeted microorganism reproduction may sound a little bit like a sci-fi story. Research and development, however, rely in part on the scientific-fantastic genre and thus point towards future technologies. Solar Air Water Earth Resource (S.A.W.E.R.) is composed of two systems, one for extracting water out of the desert air and the other for cultivating the desert into fertile land.