This article explores the relationship between environmental impacts and changing masculinities, and shows how large mining projects change men's 'ways of being'. Towards this goal, it reports a study carried out in Mindre village adjacent to the Basamuk refinery, in the Madang province, Papua New Guinea (PNG). First, I outline two broad strands in current arguments regarding the study of the environmental impacts of mining activities in PNG. Then I illustrate the reasons why both of these arguments can be applied in the context of Mindre. I then explain the ways in which some Mindre young men, particularly those who have been excluded from the benefits and employment of the Ramu Nickel project and have experienced environmental impacts, have struggled with coming to terms with their masculinities, and how these experiences have threatened their masculinities. Finally, this article offers suggestions regarding future studies of gendered impacts of extractive industries.