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SHEK MAMUDIAN, IRAQ: Amir Heidary, an Iranian engineer who has been hired by UNESCO to repair Iraqi karez, climbs up a karez shaft in Iraqi Kurdistan...UNESCO has hired two Iranians to repair ancient underground aqueducts in Iraqi Kurdistan...Over 100,000 people in northern Iraq have abandoned their homes since 2005 because of severe water shortages.  Drought and excessive well pumping have drawn down aquifer levels in the region, causing a dramatic decline of water flow in ancient underground aqueducts, known in Iraq as karez (or Qanat), upon which hundreds of communities depend....Photo by Sebastian 750 792 2163