It's always jarring to go to an otherwise gorgeous and cosmopolitan EU city and see the kind of cigarette litter the US has 30 years ago. Where I live in the US, cops actually write tickets for throwing butts on the ground, and people will yell at you for it. In Lisbon or Paris, there are entire parts of the city which just smell like an ash tray because of all the cigarette litter.
Once years ago when I used to smoke, on was visiting Ghana and people were literally yelling at me for smoking in public. It's illegal to smoke in public in a few African countries at this point IIRC.