Human excretions collect around us, and of course sometimes it can't be helped. While surfing (cyberwise) I coast onto this terlet, which makes me laugh. They're as low as $1,550, unless you buy one before the 25th. Until then you can get a 15 percent discount. So hurry up!

Here in south O.C., laminated purple signs on the groomed hills read "Do Not Drink," meaning, well, that the "water" that just sprayed on you as you walked by is recycled.

Should one compost one's own? Urf. Used to be we kept our privacy out back--far back--where our jakes consisted of trenches or deeply dug wells. I guess it was, in a way, more natural to bury it and hope nothing leaked into the nearby crick, lessin' of course it was downstream from where we bathed.

Anyway it's impossible now. Most of us don't have back yards, and those of us who do would not want that there. We'd rather have it in a room of its own a few feet from the kitchen. Thomas Crapper, the British sanitary engineer who developed the ball and suction thingy in the tank, actually saved the world billions of gallons in fresh water (and so billions of dollars in utility bills). Indeed, were it not for Mr. Crapper, we might still be going out back in the winter, except that there are so many of us now, we'd never have a moment to ourselves.I think the ultimate can will evaporate all waste or beam it into outer space. Tourists on journeys through the solar system will simply have to look the other way. That is when they're not busy.

Now what to do with the waste we don't really need to make.