Comment Salt Water? (Score 2) 167
The whole idea behind these toilets is that water is scarce and the region is poor -- that's only half-true. If you want to get down to serious, cheap answers, fund plumbing of salt water in from the ocean -- it won't be useful for drinking without some prior preparation, but the toilets, if properly made, need not be an advanced technology to function. Plus if one goes through the trouble of piping in sea water, perhaps it would open up more inland areas to the possibility of desalination plants? The demand would be limited to simply drinking water and bathing, since the toilets would be "first priority" and not need to have a constant source of fresh water like the former two. The only issue I could really see here is a requirement for redundant plumbing, in areas where having too much plumbing must seem like...well, a pipe dream.