What are the negative effects of cruise ships?

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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This research shows that cruising, despite technical advances and some surveillance programmes, remains a major source of air, water (fresh and marine) and land pollution affecting fragile habitats, areas and species, and a potential source of physical and mental human health risks.

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On average, a cruise ship generates 15 gallons of toxic chemicals each day. These materials come from on-board dry cleaning and photo-processing facilities, painting and other activities. Seven thousand gallons of oily bilge water are released into the oceans every time the ship empties its bilge tanks.

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Currently, cruise ships and other maritime vessels are responsible for nearly 3% of global greenhouse emissions each year. Considered to be worse than flying in terms of carbon emissions per passenger, a report by Pacific Standard revealed that a person's average carbon footprint triples in size while on a cruise.

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

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Cruise ships can harm coral reefs. Pollution from cruise ships can threaten coral reefs. Cruise ships can also damage reefs through collisions and anchors. Recent studies have linked coral diseases to human sewage not unlike what is released from cruise ships.

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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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Vacuum suction lines zip toilets' contents to marine sanitation farms, which siphon out the water, treat it until it's drinkable, then pump it into the ocean. Helpful aerobic bacteria digest the remaining sludge in storage tanks until it's all offloaded ashore, about once a month.

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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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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 were responsible for more than four times the sulphuric emissions into Europe's atmosphere than all of the continent's car last year, according to a new report. This comes despite repeated pledges by the industry to move towards a greener model of operating.

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Food waste is a significant problem on cruise ships, with thousands of passengers generating enormous amounts of leftovers daily. Historically, cruise lines have discharged food waste into the ocean, causing serious environmental concerns.

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“Cruising is less stressful and also means you do not lose time commuting and travelling to a destination as you will be eating, watching shows, drinking with friends and sleeping in comfort as the ship takes you to the next destination. It is a more efficient and enjoyable use of your time.”

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There's a fine line between relaxation and boredom, and cruisers on long itineraries might find themselves dangerously close to that line at some point during their vacation. The more sea days there are, the harder cruisers often have to work to fill all those hours with activities that keep them engaged.

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Some of the environmental challenges that cruise lines need to address are air pollution from heavy oil, wastewater discharge issues, habitat disruption, and overtourism. The 'elephant in the room' is that cruise lines are currently using heavy oil – also known as the dirtiest of the dirty oils.

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