Field research shows playful signs reduce tourist inertia—increasing recycling, water saving, and energy conservation without spoiling the holiday mood.
Tourism accounts for around 8% of global greenhouse gas emissions, with hotels responsible for roughly 2%. Yet sustainability communication often underperforms in travel contexts.
The key barrier is inertia. Holidays are hedonic by nature: tourists prioritise comfort, ease, and enjoyment. Traditional sustainability messages—especially moral or instructional ones—often feel like lectures that interrupt the holiday experience. As a result, guests stick to familiar habits such as overusing water and energy or ignoring recycling, even when they care about sustainability at home.
Researchers found that humour works particularly well in tourism because it fits the leisure mindset. Across five studies—including field experiments in Chinese parks and hotel-like settings, plus eye-tracking analysis—humorous signs using wordplay, incongruity, or wit consistently outperformed neutral messaging. They captured more attention, reduced perceived effort, and made sustainable actions feel easier rather than preachy.
Based on the research findings, three design factors appear critical:
But the real insight is this: it’s the humorous sign itself—not just putting people in a good mood—that drives behaviour change.
The results: The field experiments showed that humorous recycling signs increased correct disposal from 66.25% to 83.75%—a 17 percentage point lift. Eye-tracking confirmed that these humorous signs attracted significantly more visual attention than the neutral ones. Survey data also showed lower perceived effort for recycling, water saving, energy conservation, and towel reuse when humour was used.
The Business Case: Hotels face a structural mismatch: guests control consumption, while operators carry the cost. Fixed pricing removes any incentive to save water or energy—making moral messaging largely ineffective. Humorous signs cut through this impasse. They change behaviour without incentives or enforcement, making sustainability campaigns more effective without touching the guest experience—and especially powerful in fixed-rate and all-inclusive settings.
Do you know of any other nudges that use humour to make sustainability communication more effective?
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From the Green Nudges Consulting team drawing on research by Ming Lei, Yatong Li, and Makarand Mody, published in the Journal of Sustainable Tourism, examining how humorous signs influence sustainable behaviour in tourism settings.
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