Modern improvement on gathering water from the air
In the Andes, the Incas and modern-day descendents have been gathering water from the fog for centuries. The process there is simple, the fog hits some kind of cloth or sheeting and the water condenses on it. Then the water collects and rolls down into a container. These work amazingly well, but they are also huge and need pretty heavy fog to work well. Max Whisson has taken the idea that there is always (pretty much) water in the air and uses condensation to make a water gathering machine:
There’s a lot of water floating around in the air everywhere, and inventor Max Whisson has figured out a way to extract it using Max Water, a wind-powered contraption he named after himself. Max Water uses the concept of condensation, where lower temperature allows less water to hang around in the air, and Whisson says that will amount to 10,000 liters per day dripping from this single rooftop device. Man, that’s a lot of water. Source: Green Invention: Max Water Cranks Moisture Out of the Air, Seems Miraculous - Gizmodo
This looks like another great way to gather supplemental water for things like gardens, etc in the city. Of course it can serve as drinking water if it is purified. Only hitch is that right now they will set you back about $44 grand. Maybe with larger production the price can come down.