This paper is based on research with environmentally engaged trade unionists in India. It follows their trajectories into the trade union and explores their environmental engagements. A short presentation of the history of Indian trade unionism, aims to understand its ‘multi-unionism’. Analysing three exemplary life-histories of unionists, their motivations to engage in unions and their relationships to workers and to poor people, three models of perceiving the labour-nature relationship are offered: the container model, nature as a mediator of survival, and the nature-labour alliance. I show that the way in which unionists perceive the labour-nature relationship is shaped by their practices and influences their environmental policies. Furthermore, trade unions who seek alliances with other social movements on equal terms, develop a more comprehensive perception of the labour-nature relationship and thereby the development of more wide-ranging environmental policies. I conclude suggesting that the conditions enabling a more comprehensive perception of the labour-nature relationship could become possible if workers along the value chain could collaborate to learn from each other about their working conditions and the natures they transform.