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*Ground pollution will lower the land value and [[health]] of the city.
[[#Sewage Outflow Pipe|Sewage output pipe ]] can be constructed to transport the sewage to a remote part of the city.
==Sewage Disposal Structures==
===Sewage Outflow Pipe===
: ''Main article: [[Sewage Outflow Pipe]]''
===Sewage Treatment Plant===
: ''Main article: [[Sewage Treatment Plant]]''
==Sewage Maps==
