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Water shortage

&salt breeze

food shortage:

Aggression by Semites:

deforestation:

They lacked many wood in overdoing of deforestion

They irrigated it too much and damaged by salt breeze

The crops did not grow up by shortage of water

Why they disappear?

Sumerian is aggressed

over 4,000 years ago by a Semites.After that Semites established an Akkad .