How cruise ships affect the environment compared to cars?

A June study from sustainable transport campaigner The European Federation for Transport and Environment found that 63 cruise ships owned by parent company Carnival Corporation emitted 43% more sulfur oxides, a group of harmful air pollutants, than all the 291 million cars in Europe in 2022.



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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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Cruise ships burn heavy fuel oils that contain harmful chemicals and substances like sulfur and heavy metals, which can leak into the oceans. If a cruise ship has a faulty system or improper repair work, oils can leak from these areas and penetrate the oceans, causing pollution and threatening marine life.

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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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Cruise Ship Pollution Although cruise ships make up only 1 percent of the global fleet, they account for 6 percent of black carbon (BC) emissions. This reveals how disproportionately bad for the environment cruise ships are, releasing the highest amount of black carbon per ship of any vessel.

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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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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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Using the associated calculated climate factor of 2.1 (for a 2,000-3,000 passenger ship), we estimate that one individual on a 7-day cruise will have a carbon footprint of 300kg per day if that individual stays in a standard double-occupancy cabin.

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Flights emit 500 grams of carbon dioxide/metric tons of cargo per kilometer of transportation. However, ships emit only between 10 to 40 grams of carbon dioxide per kilometer. The carbon footprint of airplanes is 20 to 30 times more than ships.

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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 are a catastrophe for the environment — and that's not an overstatement. They dump toxic waste into our waters, fill the planet with carbon dioxide, and kill marine wildlife. Cruise ships' environmental impact is never ending, and they continue to get bigger.

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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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A five-night, 1,200 mile cruise results in about 1,100 lbs of CO2 emissions, according to Comer. Flying the same distance and staying in a hotel would emit less than half of that. And that's not counting for the fact that cruise guests often also have to fly to the port where they will embark.

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Port pollution: Cruise ships generate plastic waste not only while at sea but also while in port. This can contribute to plastic pollution in the surrounding waters and on nearby beaches.

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Augment this with no dumping solid waste at sea, (e.g. ground glass, cardboard and packing material, plastic), no discharges of hazardous chemicals or materials of unknown environmental impact (e.g., incinerator ash, sludge from smokestack scrubbers), and on all cruise ships have independent human monitors to observe ...

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