The program annually recognizes cruise ships whose on-board environmental systems help decrease air and water pollution. The three categories evaluated are air emission reduction, wastewater treatment and recycling and disposal programs for solid waste.

"With our clean fuel strategy using low-sulfur fuels while in port, along with reducing air emissions, advanced wastewater treatment and recycling and disposal of solid waste, we have demonstrated our commitment to maintaining the highest level of environmental protection standards," said Bill Hamlin, NCL's executive vice president of fleet operations.

The Cruise Ship Environmental Award was created by the Port of San Francisco's Cruise Terminal Environmental Advisory Committee. Established in 2003, the committee advises the Port Commission on cruise ship-related water and air quality issues. Committee members include regulatory agencies, environmental organizations, organized labor, community groups and maritime industry representatives.