What inspired your Batucada series? “Music and cans. In Brazil, people in the favelas play instruments made of tin and aluminum pots, and ‘batucada’ is the percussion sound made by beating them. The process interested me in general because Brazil recycles 98% of its aluminum — it’s a record. The cans are collected by hand by people who collect trash in the street. It’s a crazy system but it works very well. The factory that spins the aluminum for me uses recycled metal.”