Someone needs to develop a public toilet that's self-cleaning but doesn't cost more than some houses. The problem is making it homeless and drug dealer proof. SF has had major problems with their self-cleaning toilets.[1] Portland succeeded, but theirs is armored to contain a velociraptor and provides limited privacy.[2] [1] http://www.sfweekly.com/sanfrancisco/occupied-san-francisco-... [2] http://www.citylab.com/de…
Amsterdam has these: http://www.street-art.nl/wp-content/uploads/2012/07/1-1.jpg and https://pinkylightsaber.files.wordpress.com/2011/12/public-t... while useful, they usually are quite smelly though.
http://f00.inventorspot.com/images/urilift-public-pop-up-toi...