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{{Mediawiki:kindleoasis}}
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[[File:Housesteads latrines.jpg|thumbnail|left|300px|Figure 1. Communal latrine perhaps for soldiers built along Hadrian's Wall in the UK.]]
With the beginning of settled life, a new problem arose as people began to live in one place throughout the year. That problem was public sanitation. With increased population, the need to adequately remove human waste and maintain relatively clean water supplies became an increasing challenge. By prehistory, this challenge was addressed in societies, with increasing sophistication as cities grew and became more complex.
