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Solving problem's through organization, 1. to provide water they dug irrigation ditches that carried river water to their fields and allowed them to produce a surplus of crops 2. For defense they built city walls with mud and stone of brick 3. Sumerians traded their gain cloth and crafted tools with the people of the mountain and the dessert in exchange they received raw martials such as stone, wood and metal. Fertile crescet- The region's cured shape and the riches led scholars, people who farm the flat swampy land are called summerians
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