Which outcome occurred when the Sumerians over-exploited Tigris-Euphrates irrigation channels?

💡 Explanation

When the Sumerians over-exploited irrigation channels, capillary action drew groundwater containing salts to the surface because of increased evaporation, leading to increased soil salinization and lower crop yields. Therefore, decreased crop yields result, rather than flooding, ziggurat collapse, or disease outbreaks which involve different environmental factors.

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