I just came from a site about the Colorado River and the implications of its dwindling supply, due to drought and over-use.

We all agree that water is of paramount importance. I'd like to hear others' ideas on what the problems are and things we can do to mitigate them or even help solve some of them.

I'll start with a couple of ideas of my own:

1) Costly and cumbersome or not, I think all buildings should have at least two water systems, one for potable, pure water for drinking and cooking and bathing which in turn can be sent to another for toilets, gardening and watering. All water should be used at least twice.

2) As for the vast amounts needed for commercial irrigation a simple changeover to nighttime activity would save tremendous amounts of water. Homeowners are told that watering the lawn in the evening so that less moisture is lost to evaporation. Just think how much more would be saved by all-night irrigation.