Water is an important natural resource in SW Asia. SW Asians have dry land so they must irrigate their crops. In Saudi Arabia there are no permanent rivers, but has wadis. Wadis (WAH deez) are stream beds that may hold water when sesonal rains fall but are dry much of the year. People in SW Asia irrigate their crops by pumping water from deep underground wells. SW Asia nations continue to irrigate their plants and are still building irrigation systems. Water taken from rivers is not replaced quikly, otherwise known as a nonrenewable resource.
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