All of this is in my mind as I gawk at the flagrant inefficiency of these urinals at UCSC. I know some people (women) still have to walk 10-20 miles each day to fetch water, and even then the water isn't really that clean. Even here in the USA, the poor and neglected -- such as those in the Navajo Nation -- deal with horrible water conditions. And here I am flushing several gallons of clean, treated water down the drain with my pee.
If you think about it, all of the modern toilets are a water-wasting scandal. Billions of people living in more primitive conditions would be thrilled to have our toilet water for drinking, cooking, and washing. It's much cleaner and safer than the water they have access to. And here we are polluting it with our waste and flushing it down the drain, both literally and figuratively. It's crazy.
It seems pretty straightforward for a system to gather up gray water from sinks and showers in the house and feed this supply into the toilet. Is anyone doing this? We're going to have to start soon if we hope to avert the impending global water crisis.