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Known by many names throughout the Middle East and North Africa, qanats are water management systems used to provide water to human settlements and for irrigation in hot, arid, and semi-arid climates. Qanats are constructed as a series of well-like vertical shafts that tap into subterranean water and are connected by a gently sloping tunnel. Since the destination is lower than the source, the water drains into it by gravity. How were qanats used in ancient times to store ice in the desert? Discuss
Source: The Free Dictionary