Our streets look similar to this, I rarely see any litter unless after a really big event or similar. Background: I'm not in Oslo but I'm living in Gothenburg

Our streets look similar to this, I rarely see any litter unless after a really big event or similar. Background: I'm not in Oslo but I'm living in Gothenburg which is both close by (roughly 3 hours with bus) and roughly the same size. I live on the main Avenue (avenyn) walk to and from work so I see much of the central inner city every day.