在住宅四周建造湿地，使用绿化屋顶进一步提高能量效率和组织排水。

Constructed wetlands around the house and the inclusion of a green roof further help to increase energy efficiency and manage water runoff.

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例如，所有的住宅都有权使用清水和排水设施。

For example, all houses had access to water and drainage facilities.

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住宅的排水管道通常用若干条内径为10厘米由烧结粘土成制的管道，通往管径15 23厘米的街道污水管。

Several house drains, usually of 10 cm internal diameter and made of fired clay, flow into the street sewer which is of 15 23 cm diameter.

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