David Hertz is an architect and founder of Skysource the winner of Water Abundance X-Prize, was able to create water from air using 100% renewable energy sources, for under 2 cents per liter. They started with Skywater, which was able to take water out of the air, but it required humidity - what they won the prize for was WEDEW (wood-to-energy deployable emergency water), which is essentially a rainforest in a box.