Which cruise ships are the biggest polluters?

The most polluting cruise ships operator was MSC Cruises – whose cruise ships emitted nearly as much SOx as all the passenger vehicles in Europe. Accounting for all of its subsidiaries, the Carnival group polluted the most. Many cruise operators like MSC are investing in fossil gas (LNG) as a cleaner alternative.



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1. The Norwegian company Hurtigruten. Among the most environmentally sustainable ships are certainly the ships of the Norwegian cruise line Hurtigruten. The company has already eliminated heavy fuel oil (HFO) for more than a decade and uses alternative and greener fuels such as marine diesel oil and biofuels.

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Cruise ships, huge compared to other vessels, end up burning more heavy fuel oil, one of the dirtiest fossil fuels on the market. This oil contains dangerous levels of sulfur and heavy metals etc. It is estimated that cruise ships use, on average, 150 tons of heavy fuel oil every day.

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A medium-sized cruise ship spews greenhouse gas emissions equivalent to those of 12,000 cars, while environmentalists accuse big industry players of investing little in decarbonization, and of covering up endless delay tactics in a heavy coat of greenwash.

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Royal Caribbean Cruise Line (RCCL): RCCL has made a significant effort towards environmental sustainability. Princess Cruises: has a comprehensive environmental management program that includes waste reduction, water conservation, and emissions reduction.

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Cruise ships emit more carbon per passenger kilometre than flying, even considering the extra damage that emissions cause at high altitude. It's thought that the Queen Mary II emits 0.43kg of CO2 per passenger mile – that's even worse than the 0.257kg for a long-haul flight.

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During a typical one-week voyage, a large cruise ship (with 3,000 passengers and crew) is estimated to generate 210,000 US gallons (790,000 L) of sewage; 1 million US gallons (3,800 m3) of graywater (wastewater from sinks, showers, and laundries); more than 130 US gallons (490 L) of hazardous wastes; 8 tons of solid ...

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Taking a seven-day cruise is more than three times as carbon-intensive as flying and staying abroad.

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Pursuing Net Zero Committed to pursuing net zero GHG emissions by 2050 across our operations and value chain. Reducing Carbon Intensity Achieved a 25% reduction in fuel consumption per capacity day fleetwide from 2008 to 2019. Investing in Shore Power ~40% of the NCL fleet has shore power capabilities.

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Can cruise ships dump waste at sea? Yes. It's quite legal to dump sewage and food waste into the sea. U.S. law requires cruise ships to treat waste within about 3.5 miles of shore—but beyond that, there are no restrictions on dumping polluted sewage and graywater.

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Yes, many cruise ships dump plastic at sea. It's illegal according to U.S. and international maritime law, but many companies have proven they don't care, and have been caught illegally spewing plastic into the sea. Carnival Cruise Lines was found dumping food mixed with plastic waste into the waters of the Bahamas.

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A painfully obvious ship assumption Well, you're not. Larger ships do tend to impact the environment more than smaller ships, especially passenger-packed cruise ships – though obviously there are many exceptions, which we'll address later.

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The employee experience below at Royal Caribbean Cruises Ltd., compared to a typical U.S. based company. 81% of employees at Royal Caribbean Cruises Ltd. say it is a great place to work compared to 57% of employees at a typical U.S.-based company.

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All of that waste is either processed via biodigesters or dehydrators, or offloaded on shore. Some of the company's ships have long had dehydrators, which squeeze the water from food waste and lighten the load that can be taken to landfills, compost sites or waste-to-energy facilities.

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In terms of carbon dioxide production, each day you spend as an individual passenger on a cruise ship generates approximately 420 kilograms of carbon dioxide per day.

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But just how severe is their impact on the climate? Unfortunately, taking a cruise takes a toll on the planet. Your trip will average anywhere from 700-1000 pounds of carbon emissions a day, which is much higher than flying, driving or a traditional 'land' vacation.

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