Also makes sense in Japan (and Korea, and maybe other places I don't know about), where the populace is very mindful not just of making sure garbage ends up in

Also makes sense in Japan (and Korea, and maybe other places I don't know about), where the populace is very mindful not just of making sure garbage ends up in a can, but as well separating it based on the type of garbage. Contrast with the US, where people decide to save a few bucks a month by dumping their garbage bags along the side of the road, or tossing garbage out the window of their car.