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| Warka Tower: How it functions, WarkaWater |
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A while back I posted about the Warka Tower, DIY: getting water from air. I'm happy to report that the Warka Water project is strong and evolving. That it doesn't require electricity is one of its best features.Atmospheric water generation isn't particularly new (see air well), but growing awareness of the need for good potable water in developing countries has spurred new approaches. To wrap your head around the enormity of the need, check out Water for People and Earth Institute's State of the Planet, where fog collectors are described.
A new company in South Africa, Water from Air, is making a splash ( ;-) ). Their video raises an interesting point about water purification. There's also Water-Gen, which was developed primarily for the Israel Defense Forces (IDF).
Standing or sitting water can pose health problems, because it may foster the growth of unfriendly microorganisms. Ultraviolet water purification is widely used; this site compares it with chlorine purification.
Not all water collection must result in potable water. FogQuest in one project "provide[s] water for a commercial aloe vera crop" in Chile.
As an aside: I never fully understood what Luke Skywalker's aunt and uncle did on Tatooine. They had a Moisture Farm. Here Luke Skywalker and WED-15-77, a Treadwell droid, attend to a moisture vaporator on Tatooine,
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-- Marge
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