Clean
Having just spent 10 days in Australia, I noticed early on that it's a very clean place. Not much litter, trash or crunk around to catch the eye. I spent most of my time in a hotel, where initially I thought they were short of trash cans, ashtray-like receptacles, etc. Then I spent a day in Sydney. Same observation. The streets DON'T have a waste basket every ten feet. I think I have it sorted, the Australians have been well-trained to stay clean. To put things in the trash right where they stand, especially when eating. Food storage and consumption makes for plenty of litter. The hotel was scarce for waste drops throughout the common areas. What if you were trained to stay in one place and eat, or forced to carry your trash with you until you discovered a place to throw it away? That's what I think is happening over there. In NY, there are overflowing trash cans everywhere, and plenty of junk around them, on top of them or at the foot of trash cans. It's so easy to find a trash can, we are used to doing whatever and making it work. What if we had to think about where that wrapper was going to be discarded, would it make a difference?
We don't have as clean a place as they do in Australia. Maybe it's because Aussies have less options to dispose of junk away that keeps their country so neat?