[Greenbuilding] quick tools for calculating rainwater run-off?

[Reuben Deumling]

On Wed, Feb 16, 2011 at 8:04 AM, Nick Pyner <npyner at tig.com.au> wrote:

>
> I find it pretty hard to come to terms with being self-sustaining in water
> when there is amains supply out in the street, but people do.
>

Perhaps the reason other people do is that they are not so confident that
that mains out there is going to always be there.
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