Fabiana da Silva, 38, a former crack user who now collects recyclable materials, pushes her cart loaded with recyclables, accompanied by her son Brian (R), 8, and her nephew Jean (C), 9, in Sao Paulo, Brazil, July 4, 2017. REUTERS/Nacho Doce SEARCH "NACHO RECYCLING" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.