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Mottley, Robert.  "Staying Clean and Green Requires Training As Well As Hardware," Marine Log, 1994, 99:8 (August), 35-37

Although shipboard hardware has generally been improved to meet more stringent environmental regulations, the appropriate crew training lags behind. Waste management and monitoring systems, once installed, are not always operated to standard by untrained crews, as several examples illustrate. Coast guard inspection teams closely monitor compliance with environmental regulations on waste treatment and disposal. These regulations apply to tankers and cruise ships alike. Cruise ships generate a large amount of daily garbage, and also carry passengers willing to witness violations and thus claim rewards for improper waste disposal. Air pollution is also closely regulated in the shipping industry; ships calling on the port of Los Angeles may encounter problems due to the city's strict air pollution laws.