Fickle, the Sydney Olympic Park model is really good. But how feasible is it to adapt new or existing buildings / suburbs / whole cities to this model, with anything like this sort of improvement in water-use efficiency?

I reckon we would still be battling to get more than a few percent improvement on a per-capita basis, which again, would just simply be overwhelmed in most places by the growth rate.

“Putting it another way we could increase the population of Sydney by 16 times and not use any more water from dams.”

Yes! This is exactly how authorities would think about it…….’oooow goodie, we have greatly improved water efficiency, so now we can continue pandering to the real estate moguls and land speculators and our big business buddies for another decade or so before we need to start worrying again’!