The present work discussed the different water production techniques that used to overcome physical water scarcity problem. A new water production technique called "Water Recovery from Atmospheric Air" is introduced as an innovative solution. This system depends on extraction of water vapor from atmospheric air by using wet desiccant material during night time then evaporates the absorbed water during the day time by solar energy and the evaporated water condensate on the solar collector sides. In order to investigate the system performance, a new mathematical model is introduced. The new...