Perspectives of individuals on reducing meat consumption to mitigate climate change - a scoping review.

Background: As high meat consumption is detrimental to both individual health and the climate, many international organizations recommend a reduction in meat consumption among populations. This scoping review aims to synthesize the evidence on individuals' perspectives on reducing meat consumption to mitigate climate change. The three research questions focus on (1) the individuals' awareness of the link between meat consumption and climate change, (2) individuals' willingness to reduce their meat consumption to mitigate climate change, and (3) individuals who have already reduced their meat consumption for this purpose.

Methods: This scoping review follows the extended PRISMA guidelines for scoping reviews. A systematic search was conducted in five databases (Medline, Scopus, Embase, Greenfile and PsynDex/CurrentContent/Agris via Livivo). Only peer-reviewed original studies, published since 2015, in English, German, Danish or Dutch were included. Two researchers performed all screening procedures. Data from included studies were summarized in a narrative and descriptive synthesis of evidence, separately for quantitative and qualitative studies.

Results: A total of 93 studies were included. The majority of studies were published since 2019, had a quantitative study design, and were conducted in Europe. Awareness of the link between meat consumption and climate change is low in most studies, and many people underestimate the climate change mitigation potential of meat consumption. Women and people with lower current meat consumption are more willing to reduce their meat consumption. Health and animal welfare are often the main reasons for reducing meat consumption, with climate change being a secondary motivation for most. However, studies varied in the questionnaires used, and many had small sample sizes, limiting comparability and generalizability.

Conclusions: Further research using nationwide samples and standardized, validated instruments would improve insight into individuals' perspectives on reducing meat consumption to mitigate climate change and is crucial to understanding of how to effectively promote a more plant-based diet. As media and political attention to climate change mitigation is increasing, it will be valuable to monitor changes in individual awareness, willingness and motivation to reduce meat consumption across populations worldwide.

Trial registration: This scoping review has been registered at Open Science Framework ( https://doi.org/10.17605/OSF.IO/MWB85 ) and the review protocol has been published in BMJ Open.