<P> Cruise ships carrying several thousand passengers and crew have been compared to `` floating cities , '' and the volume of wastes that they produce is comparably large , consisting of sewage ; wastewater from sinks , showers , and galleys ( graywater ) ; hazardous wastes ; solid waste ; oily bilge water ; ballast water ; and air pollution . The waste streams generated by cruise ships are governed by a number of international protocols ( especially MARPOL ) and U.S. domestic laws ( including the Clean Water Act and the Act to Prevent Pollution from Ships ) , regulations , and standards , but there is no single law or rule . Some cruise ship waste streams appear to be well regulated , such as solid wastes ( garbage and plastics ) and bilge water . But there is overlap of some areas , and there are gaps in others . </P>
<P> Cruise ships carrying several thousand passengers and crew have been compared to `` floating cities , '' and the volume of wastes that they produce is comparably large , consisting of sewage ; wastewater from sinks , showers , and galleys ( graywater ) ; hazardous wastes ; solid waste ; oily bilge water ; ballast water ; and air pollution . The waste streams generated by cruise ships are governed by a number of international protocols ( especially MARPOL ) and U.S. domestic laws ( including the Clean Water Act and the Act to Prevent Pollution from Ships ) , regulations , and standards , but there is no single law or rule . Some cruise ship waste streams appear to be well regulated , such as solid wastes ( garbage and plastics ) and bilge water . But there is overlap of some areas , and there are gaps in others . </P>
what do cruise ships do with their garbage
what do cruise ships do with their garbage
waste streams
waste streams