[ceejayoz]

Australian toilets frequently have two buttons, one for a small flush (for urine) and another for a larger flush. "No flushing" is hardly the only option.

California needs to tackle water usage. There are reasonable changes that can be made in homes and towns - swapping to drought-resistant gardens instead of lawns, rain barrels to catch run-off, absorbent parking lots that don't drain out to the sewers, etc.

Agriculture also needs to be tackled, sure. That doesn't mean saving a percent here and there is of no use.

[bdamm]

This style of toilet is already very common in California, as is drought resistant landscaping. There could be more, but California could already be past 50% towards best case on those approaches.