Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Old Walled City of Shibam' has mentioned 'Erosion' in the following places:
Occurrence Sentence Text Source
In order to protect the buildings from rain and erosion, the walls must be routinely maintained by applying fresh layers of mud.
The mudbrick buildings are frequently threatened by wind, rain, and heat erosion, and require constant upkeep in order to maintain their structures.