Most of Australia does that, TBF.

Yes, there's litter in Australia of course, but most Australians are taught from a young age to leave nothing but footprints and trek out whatever they bring with them when moving about a city, a park, wild areas.

Relative lack of litter and glares from Australians when tossing stuff on ground as a tourist is apparently enough to make a number of those daft "10 things about Australia ..." videos and listicles.