Here are a couple that impressed me:
http://www.seawatergreenhouse.com/technology.html
Uses passive evaporation in hot, arid coastal areas to fill a large greenhouse with cool moist air, and incidentally dampens the atmosphere downwind enough to cause spontaneous “greening”. Can exploit hot air from a power plant, etc., also. Significant soil remediation implications.
http://www.energyrecovery.com/index.cfm/0/0/32-How-It-Works.html
Clever ceramic cylinder design which “chops” low-pressure salty outflows back into the …
Oh, hell, watch the video. <;-)
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