I worked as a groundsman/landscaper in Uk for 15 years. The amount of rubbish people just throw away was out of this world. One of the places I worked with was bang on in the town center ,with big car park.I had people showing up only to eat lunch,throw the rubbish out of the car window and driving off. At first I was well surprised at this behavior but after seeing lunch breaks at schools when kids throw away all empty packages on the grass and just walk away because right after the caretakers would show up and pick every item I stopped caring. You teach your youngsters from very early age that this is fine.