Here is a fascinating human geography study of the Zabbaleen. They are a sub-class of people who work as garbage collectors in Cairo, Egypt. I can't say enough good things about this resource in my limited space here. It is fabulous! If you are a secondary teacher looking to challenge and engage your learners in a study of human geography, this instructional activity is for you! Worksheets, photographs, maps, and clearly written instructions for the activities are all present.