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Pay-per-kilogram and other money math: what actually nudges tourists toward greener choices
A South Korean field experiment finds tourists' stated green intentions shift most when a carbon price is attached to their bill. Voluntary towel cards lag behind.

Desk note: Phys.org covered the Hanyang University finding on 15 July 2026. Monexus read the original reporting and ran the result against the broader literature on stated-versus-revealed preference in carbon pricing, then checked against EU ETS and ICAO CORSIA documentation for the aviation parallel. The article deliberately does not name individual researchers, consistent with our byline-hygiene rules.
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