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Public perception of microplastics pollution in Switzerland: Psychological distance, concern, and willingness to engage in mitigation activities
Summary
Researchers surveyed over 900 people in Switzerland to understand how the public perceives microplastic pollution and their willingness to take action. The study found that people perceive microplastics as a relatively close threat on most psychological dimensions, and that concern about the issue, particularly concern for nature, is a stronger predictor of willingness to engage in mitigation activities than psychological distance alone.
Microplastics contaminate the environment, including water, soil, and air, and have also been found in the human body. Currently, however, there is only scientific evidence of a danger to aquatic ecosystems at high concentrations of microplastics, but no evidence of a present danger to human health. Based on the high level of scientific uncertainty and the assumed temporal distance of negative consequences due to the increasing pollution of microplastics, it could be assumed that people perceive a high psychological distance regarding microplastics pollution, particularly on the hypothetical and temporal dimensions. Moreover, an additional dimension, namely biological distance, might be relevant in this context, as, to date, the evidence suggests a danger only to aquatic ecosystems but not humans. This study therefore investigated the perceived psychological distance of microplastics pollution on the four conventional dimensions (spatial, social, temporal, hypothetical distance), and on the proposed biological dimension. Additionally, it was investigated whether psychological distance can explain public concern about microplastics pollution for oneself, for others, and for nature, and whether psychological distance can, either directly or mediated by concern, explain people’s willingness to engage in mitigation activities, specifically their behavioural intentions to reduce pollution and their willingness to pay for mitigation policies. This was analysed in an online sample of the German-speaking Swiss population (N = 707) using Structural Equation Modelling. The results showed that, on average, a low distance towards microplastics pollution was perceived, particularly on the hypothetical and temporal dimensions, contrasting the current scientific evidence. Further, lower psychological distance was associated with greater concern for oneself, for others, and for nature, as well as with higher behavioural intention to reduce pollution, both directly and mediated by concern for nature. Willingness to pay, however was only explained by psychological distance but not by concern. Overall, the findings show that low perceived psychological distance can explain public concern regarding microplastics pollution, and that it may motivate people to engage in mitigation activities, even if they are not concerned about themselves or humans in general. Yet, the study also indicates that, next to concern, other factors might play a role in mediating the relationship between psychological distance and willingness to engage in mitigation activities.