The dissolution of the union began in the 1980s
Answer:
Sargon
Before Sargon took power, the prominent Sumerian city-states of Ur and Uruk contended with Kish to their north, in Akkad, near modern-day Baghdad. Sargon began his rise as a cupbearer to the king of Kish, whom he eventually overthrew
Answer:
Poor agricultural practices
Explanation:
Farmers in the Great Plains region didn't allow the soil to recover, and it combined with wind erosion, drought and high temperatures lead to the Dust Bowl