| Sumario: | This article presents a reflection on the ways in which popular urban worlds are created through the mediation of a specific socio-technical instrument, the "waste and recycling carts". In dialogue with the social studies of waste, we use a material and sociotechnical approach to think about this object and its agency in the strategies of making a living and in the daily practices of workers who collect and sell recyclable materials in two Brazilian capitals. Two ethnographic cases focused on specific wheelbarrows are presented, revealing the uses of these socio-technical instruments in their relationship with the body, subjectivity, life projects, economic logics, political strategies and urban dynamics. Based on two studies in the cities of João Pessoa-PB and Rio de Janeiro-RJ, methodological resources were used, such as imagery, life stories, participant observation and monitoring of the Cataki platform. The cases provide insights into the different logics that underpin ways of governing peripheral populations and contemporary ways of inhabiting cities.
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