CLIA: The annual environmental technologies report
The global cruise industry continues to make significant strides toward environmental sustainability. Cruise Lines International Association (CLIA), the leading organization representing the cruise industry, has recently published its annual Environmental Technologies and Practices report, analyzing progress made by its members from 2018 to 2024.
The report highlights how cruise lines are investing in technological innovations and operational strategies to reduce the environmental impact of their activities, aiming for more efficient resource management and a substantial decrease in emissions.
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It shows that the majority of oceangoing ships owned by CLIA members are small to mid-sized vessels, and that the fleet composition is expected to remain stable at least through 2036. A particularly noteworthy development is the growing adoption of multi-fuel engines, which allow ships to switch from traditional fuels to zero or near-zero emission fuels both in port and at sea. The number of ships equipped with this technology has risen from just one in 2018 to 19 today, with projections exceeding 30 ships by 2036. The use of alternative fuels such as biofuels, methanol, and liquefied natural gas is a key part of this transformation, confirming the cruise industry’s commitment to low-impact environmental solutions.
Another significant advancement involves the spread of onshore power supply (OPS) technology, enabling ships to shut down their engines while docked, reducing emissions by up to 98%. The number of ships with OPS capability has nearly doubled in recent years, and the availability of this technology in ports is increasing, especially in Europe, which is set to mandate OPS installations by 2030 to comply with decarbonization regulations. Additionally, the number of ships equipped with advanced systems to reduce nitrogen oxide and particulate emissions has also grown, as well as those fitted with modern onboard freshwater production systems that reduce reliance on port resources.
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On the waste management front, cruise lines are adopting innovative new technologies such as waste-to-energy gasification systems and microbial digesters for food waste treatment, which are becoming increasingly common aboard ships. These advancements offer a concrete response to growing environmental demands and help reduce the overall impact of cruise operations. While challenges remain, the industry is demonstrating a strong commitment to innovation and responsibility, with substantial investments in new ships and sustainable technologies.
In conclusion, CLIA’s 2025 report confirms that the cruise industry is rapidly evolving toward a more sustainable model, thanks to a combination of advanced technologies and rigorous environmental practices. Focus on energy efficiency, emission reduction, and responsible resource management is transforming cruising, making it more compatible with the needs of the planet and future generations. This collective commitment by operators, ports, and institutions marks a crucial step toward ensuring maritime tourism grows in harmony with environmental protection, offering travel experiences that respect the global ecosystem.
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