29 set 91 ano antes da era comum - Public Health and Sanitation Systems
Descrição:
- Created aqueducts to carry clean water to the cities- Built sewers to carry waste materials away from cities
- Used filtering systems in public baths to prevent disease
- Drained marches to reduce the incidence of malaria
Adicionado na linha do tempo:
Data:
29 set 91 ano antes da era comum
Agora
~ 2117 years ago
