3 фев 7500 г. - Early sanitation
Описание:
Clay pipes were evident during this period of time where civilians knew of dumping waste safely. Vertical shafts were utilized for disposal of waste and wells were used for fresh water. This was seen in the earliest settled societies such as the Indus Valley, Mesopotamia, and Iran.Добавлено на ленту времени:
Дата:
3 фев 7500 г.
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~ через 5477 г