Scientists at Israel’s Technion have designed a low-energy system for harvesting safe drinking water from air. It uses a liquid desiccant to separate water vapor from air and then condenses just the vapor. It saves up to 65% of the energy of current systems.

http://nocamels.com/2016/09/drinking-water-from-air/

http://pubs.acs.org/doi/abs/10.1021/acs.est.6b01280