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The Persian ice house, or how to make ice in the desert
The Persian ice house and ice making technique are a fine example of what can be achieved without electricity by understanding physics and the local climate.

The qanat, a man-made underground river in the desert
The ancient qanat technology of Iran can teach us a lot about the sustainable management of groundwater resources in dry regions.
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Natural ventilation with windcatchers in Iran
Traditional Iranian windcatchers are passive ventilation and cooling devices that can inspire energy efficient natural ventilation systems today.