Small actions can make a big difference: voluntary employee green behaviour at work and affective commitment to the organization

In the workplace, discretionary pro-environmental actions made by employees are referred to as voluntary employee green behaviour (VEGB). This is increasingly recognised as a contribution to both the environmental and the financial sustainability of the organisation. However, the implications of VEGB beyond its original environmental domain largely remain underspecified, thus constraining the theoretical development of the field and advocacy for organisations in practice. This study thus investigates how VEGB associates with the employee outcome of affective commitment, which especially impacts the psychological relationships that employees develop with their organisations. Drawing on two studies, we found that VEGB was positively associated with affective commitment, as enabled by three mediating mechanisms that enhanced the sense of warm glow and moral credit for employees while protecting them against emotional exhaustion. Moreover, we found that perceived organisational support for the environment served as a boundary condition for VEGB and its mediation by moral credit and emotional exhaustion. Implications for theory and practice are discussed in the paper.