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irrigation systems built in Eastern Mediterranean have provided the water needed for agriculture for 7000 years.
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If they are of unequal density, one plate usually sinks beneath the other in a subduction zone. The western coast of South America and the Himalayan Mountains are convergent plate boundaries. Also called active margin collision zone See more at tectonic boundary.
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<em>Terms of trade are defined as the ratio between the index of export prices and the index of import prices. If the export prices increase more than the import prices, a country has a positive terms of trade, as for the same amount of exports, it can purchase more imports.</em>
<em>God</em><em> </em><em>bless</em><em> </em><em>you</em><em> </em><em />
