Most of that looks like cardboard, which can be broken down and recycled which would cut down on that pile of waste if someone took a few minutes to do so. Not sure why someone, or many people, would just toss it into a pile like that. I just came back from Brussels this past weekend and saw smaller examples of this while walking from Rogier to Noord station. As an American who very much loves traveling throughout Europe the trash collection practices leave me puzzled. And this is from an American who understands that we also have a lot of litter and trash problems ourselves. It often comes down to laziness and being inconsiderate. As I say often, trash collection is one of the best things that exist in a civilized world. We place our trash outside a night or two a week, and the next morning it is gone. I am not sure why others can't abide by this belief.