Mary Henning and Ann Wansbrough's renovation of a semidetached cottage enables them to use 75 percent less town water than the average two-person home.  Photo 1 of 1669 in Favorites by Aaron Britt from Super Sydney: 5 Modern Houses Down Under

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Mary Henning and Ann Wansbrough's renovation of a semidetached cottage enables them to use 75 percent less town water than the average two-person home.