Consumer Perception of Carbon Labeling in Sustainable Food Choices

Consumers increasingly encounter carbon footprint labels on food packaging and menus as a means of communicating environmental impact. The success of these labels depends on perceived credibility, clarity of design and relevance to purchasing decisions. Recent experiments indicate that colour-coded or graded schemes facilitate comparative choices by simplifying complex emissions data, while numeric indicators require higher consumer motivation to interpret. Believability and personal environmental concern moderate responses: those with stronger climate commitments are more likely to shift towards lower-emission foods, whereas sceptics or price-sensitive individuals may disregard or avoid the information altogether. Cultural and demographic factors, including education level and dietary preferences, further shape label interpretation, leading to heterogeneous outcomes across populations. Practical implementation trials in retail and institutional settings demonstrate modest but meaningful reductions in high-carbon meal selections, underscoring carbon labels as a low-cost policy tool. However, design refinements and complementary interventions—such as educational campaigns or integrated nudges—are often necessary to enhance impact at scale.

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Consumer Perception of Carbon Labeling in Sustainable Food Choices publication trend

The graph below shows the total number of articles in consumer perception of carbon labeling in sustainable food choices across all publications each year (not limited to Nature Index journals).

Technical terms

Carbon footprint label: A label indicating the greenhouse gas emissions associated with the production, distribution and consumption of a food product.

Discrete choice experiment: An experimental method that presents consumers with sets of products varying in attributes to infer relative preferences and predict choice behaviour.

Traffic-light label: A qualitative, colour-coded labelling scheme using green, amber and red signals to indicate low, medium or high environmental impact.

Cognitive dissonance: The psychological discomfort experienced when an individual holds conflicting beliefs or attitudes, which can influence avoidance of unwanted information and subsequent decisions.

References

1. Positive, negative or graded sustainability labelling? Which is most effective at promoting a shift towards more sustainable product choices?. Business Strategy and the Environment (2024).
2. Unsustainable burgers? Deploying carbon footprint labels to enhance sustainability perceptions of animal-based food products. Journal of Retailing and Consumer Services (2024).
3. Do carbon footprint labels promote climatarian diets? Evidence from a large-scale field experiment. Journal of Environmental Economics and Management (2022).
4. Interested, indifferent or active information avoiders of carbon labels: Cognitive dissonance and ascription of responsibility as motivating factors. Food Policy (2021).
5. Is food labelling effective in reducing climate impact by encouraging the substitution of protein sources?. Food Policy (2021).