Xavier 2/18/13
TB: 3 S.S Rivers are essential to the development of early civilizations because they are fresh water which people can drink from, non-like sea there is salt water and people can’t drink from it. They use Rivers to grow crops like reeds or papyrus. Another reason why rivers are essential to early civilizations because they irrigate the field, grow plenty of food and trade with other countries. Without rivers there were food shortages in hills, uncontrolled water supply on plains, systems that provide water across village’s bounties. There is some positive effects and negative effects, one of the good effects were when rivers flood the lands and it gives fertile soil and easy for farming. But the negative effects is that when a river floods it can destroy crops, flood animals and probably can destroy. The negative impact was that the people of Mesopotamia didn't know when the rivers would flood, so the flood ruined their crops and homes. For example like Mesopotamia they made irrigation systems to provide food for Sumerian farmers. The rivers past through many villages and it made it complex. Also the rivers were essential to the Egyptians because the Environmental factors affected