A take-home message: workplace food waste interventions influence household pro-environmental behaviors

Previous research on food waste interventions has mostly focused on micro-level factors related to the individuals, and largely neglected macro-level contextual factors such as work-to-home spillovers. Inspired by the multi-level framework, we present a case study of how macro-level workplace campaigns could decrease food waste in staff cafeterias, compete with micro-level factors like environmental identity, and further stimulate some employees’ food saving efforts at home. The workplace interventions combined smart bins with fortnightly informational feedback trialed in three staff cafeterias of a large hotel chain in Macau, China. Actual food waste data and self-reported behavior consistently show that the staff cafeteria receiving environmental framing with anthropomorphic cues had more reductions in food waste behaviors. A key determinant of self-reported food saving efforts at home was efforts to reduce food waste at work, which predicted beyond and above environmental identity and provided evidence for positive contextual spillover effects.