Big new technological advancements ?

[baja_yu]

Making (forcing) us to flush with gray water doesn't bring those without clean drinking water any closer to that reality.

In addition, is flushing with clean, sanitary, water a problem? Is it a health risk? If it doesn't make one difference or another, why do it? Is there truly 'no burden' in actually converting to a dual water system? If so, why are we not doing it now? (I'm certain if we followed this argument it would eventually end in the Godwin-like Big Oil barrier).

Where did I say this should be done because flushing with clean water is unsanitary or a health risk? You're arguing with statements that I've never made.
I'm simply saying is that it's a waste of a pretty valuable resource, and that steps should be made to conserve it. I'm not advocating for a dual water system, that might in fact be the most expensive solution especially if you were to retrofit it to existing buildings.

EDIT: And you already have laws limiting the amount of water per flush to 1.6 gallons, so how would a similar (and reasonable) mandate be different? But I guess you flush twice just to spite the government.