>and that affects everything - more cars This right here is the root problem. If you increase housing density in America, everyone expects a place to put thei

>and that affects everything - more cars This right here is the root problem. If you increase housing density in America, everyone expects a place to put their car, and to be able to use a car to get around, so you don't improve stuff that much. We need to get rid of cars altogether as a primary people-mover; then you can really build things closer together, and not have to waste so much space on parking lots. Trash and water aren't problems; they don't take up a lot of space, though you do need a source of freshwater to supply the city, but unless you're in the desert that shouldn't be that big a problem. Schoolkids aren't a big problem in urban areas: people aren't having kids any more.