There was a small project where somebody used a hygroscopic substance (Silicagel) to collect water in the atmosphere in the desert and freed it with concentrate

There was a small project where somebody used a hygroscopic substance (Silicagel) to collect water in the atmosphere in the desert and freed it with concentrated sunlight, and then condensed it. http://perkscience.com/harvest-water-desert-air/ http://perkscience.com/harvest-water-desert-air/