ABSTRACTThis paper argues that Environmental Labour Studies may benefit from incorporating the perspective of environmental justice. We offer a theorization of working-class ecology as the place where working-class communities live and work, being typically affected by environmental injustice, and of working-class environmentalism as those forms of activism that link labour and environmental struggles around the primacy of reproduction. The paper’s theoretical section draws on a social ethnography of working-class ecology in the case of Taranto, a mono-industrial town in southern Italy, which is experiencing a severe environmental and public-health crisis. We show how environmental justice activism since the early 2000s has allowed the re-framing of union politics along new ways of politicizing the local economy. We conclude by offering a conceptual topology of working-class ecology, which situates different labour organizations (confederal, social/community, and rank-and-file unions) according to their positioning in respect to environmental justice.