Which environmental factor most significantly accelerated the deterioration via efflorescence of Mesopotamian Ziggurats constructed primarily from mud brick?

💡 Explanation

When the soil has high salt content, capillary action draws saline groundwater into the mud bricks because water evaporates at the surface of the Ziggurat leaving salt deposits which crystalize and expand breaking down the brick. Therefore salt-induced efflorescence deteriorates brickwork, rather than weather, wind, or seismic activity which have distinct mechanical consequences.

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