The slidshow presents the Forage Tracking project, a cooperative project between the MIT senseable city lab, MIT co-lab, the University of São Paulo, and Coopamare. The Forage Tracking project is mapping the tacit knowledge and spatial organization of informal recyclers in São Paulo, Brazil, using location-detecting hardware and software to investigate how Catadores, informal recyclers in Brazilian cities, find and collect material in the city. The project team is also developing participatory platforms that will help Catadores organize their activities and connect the cooperative to the citizens. In the work with the recycling cooperative COOPAMARE, the team is trying to increase visibility and understanding of the service they provide to the city. The Prezi slideshow was created with information supplied by the Forage Tracking Project (http://senseable.mit.edu/foragetracking/?page_id=12).