That's a good idea David. I remember watching something on TV about green renovations to a house in Georgia, and they used a lot of tall grasses, plants and flowers in their yard that don't need a lot of water to grow and be maintained rather then having grass in their yard..
You may also want to look at the rain barrel set up in the other threads to collect raid water when it does decide to rain in Australia (although maybe you already have that in place).
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