San Francisco is also spending 40 million dollars to rethink and redesign its water and sewage treatment, as water outfall pipes like this one can be flooded with seawater, causing backups at the plant, harming the bacteria that are needed to treat the waste.
旧金山还花费四千万美元 去反思和重建下水道处理系统。 因为像这样的排水渠口也可能被海水淹没， 从而危害植物，滋生细菌。 需要建立设施来处理这些浪费。