Amos Bien of the Global Sustainable Tourism Council in Costa Rica discusses the impacts of the cruise industry in Central America, during a conference in Charleston, S.C., on Thursday, Feb. 7, 2013. The international conference on the impact of cruises on historic port cities is under way in Charleston where the city's year-round cruise industry has prompted lawsuits in both the state and federal courts. (AP Photo/Bruce Smith)

Associated Press
Amos Bien of the Global Sustainable Tourism Council in Costa Rica discusses the impacts of the cruise industry in Central America, during a conference in Charleston, S.C., on Thursday, Feb. 7, 2013. The  international conference on the impact of cruises on historic port cities is under way in Charleston where the city's year-round cruise industry has prompted lawsuits in both the state and federal courts.  (AP Photo/Bruce Smith)
Amos Bien of the Global Sustainable Tourism Council in Costa Rica discusses the impacts of the cruise industry in Central America, during a conference in Charleston, S.C., on Thursday, Feb. 7, 2013. The international conference on the impact of cruises on historic port cities is under way in Charleston where the city's year-round cruise industry has prompted lawsuits in both the state and federal courts. (AP Photo/Bruce Smith)
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