To be fair, some of this trash may be accidental. The owners of these pieces of trash may have disposed of it the way they should be but something happened to disperse the trash. I've seen trash being blown out of trashcan before.
There needs to be three things in regards to trash: 1)Put trash where it belongs, 2)responsible trash collection and handling, and 3)trash removal when it does get on the ground. Some of this is on the shoulders of the government but most of it is on people and how much apathy they have.