We've talked a lot about urban farming initiatives (Credit crunch causing a green-slip in the sustainability agenda? , Cuba: Not Just Cigars ), but never about vertical farms using seawater.
- Air is cooled and humidified by trickling seawater over an evaporator
- Air passes through second evaporator and mixes with the warm dry air of the ceiling interspace making the air hotter and more humid
- Warm air rises, passing through a central chimney where it condenses when it comes in contact with tubes containing cool seawater
- Condensed fresh water is collected to be used to water the crops