It is 2041, and we are planning our summer vacation. Cruise ships still exist, but they are no longer the unlimited floating cities they once were. Instead, the number of cruises operating each year is carefully managed through a global carbon budget system.
This change became necessary because cruise tourism has continued to grow rapidly. According to the Cruise Lines International Association (CLIA), the industry carried more than 34 million passengers in 2024 and is expected to keep expanding (CLIA, 2025). However, cruise ships have a substantial environmental footprint. Research has shown that cruise ships can emit more than three times as much CO₂ per passenger-kilometre as aircraft, trains, and passenger ferries (Klein, 2010).
To address this problem, governments introduced annual emission caps for cruise companies. Each company receives a limited number of operating permits based on environmental performance. Companies that invest in cleaner fuels, shore-side electricity, and energy-efficient technologies are rewarded with additional permits.
One challenge is that cruise companies may resist these measures because fewer voyages could reduce profits. Tourist destinations that depend on cruise visitors may also fear economic losses. To overcome these obstacles, part of the revenue from carbon permits is reinvested in coastal communities and supports workers transitioning to sustainable tourism activities.
A creative feature of this system is the “Ocean Restoration Ticket.” Every cruise passenger contributes a small fee that directly funds coral reef restoration and marine conservation projects. By 2041, traveling by sea is no longer just about seeing the ocean—it is also about helping protect it.
References
CLIA (2025). State of the Cruise Industry Report: https://cruising.org/news/new-2025-state-cruise-industry-report-shows-cruising-vibrant-tourism-sector-growing-steadily
Klein, R. A. (2010). “The Cruise Sector and Its Environmental Impact”. In “Tourism and the Implications of Climate Change: Issues and Actions”. https://www.emerald.com/books/edited-volume/12706/chapter/83026555/Chapter-6-The-cruise-sector-and-its-environmental