International Centre for Cruise Research
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Campbell, Frank A.  "Whispers and Waste," Our Planet, 1999, 10:3, 13-14

The cruise ships that ply the waters of the Caribbean generate 82,000 tons of waste annually, or 77% of all ship waste in this region. Each passenger accounts for 3.6 kg of waste daily, a problem that is compounded as ships get larger and larger. The vessels themselves generate a large amount of oil waste, which is a direct cause of marine pollution.
Caribbean nations are gradually enacting laws against illegal dumping of cruise ship wastes, spurred by the International Convention for the Prevention of Pollution from Ships (MARPOL 73/78). This convention enforces four annexes on waste: oily waste, noxious liquids, harmful substances, and garbage. Management of shipboard sewage is not yet effectively regulated.