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With Carnival Cruises waste materials on board are either recycled, incinerated, or offloaded for disposal on land rather than at sea. In addition, non-usable items, such as mattresses and computers, are donated to charities. The Carnival Spirit features an advanced black water/gray water (waste water from toilets, showers, and sinks) purification system and is outfitted, along with the Carnival Triumph, to monitor ocean water quality. The company also supports local environmental initiatives, such as the Coral Reef Task Force.