"The project, led by the department, is the city's latest and largest attempt to restore a self-sustaining oyster population in Jamaica Bay in the hope of improving water quality, protecting the shoreline from erosion and reviving habitats for fish and wildlife . . . With the placement of an additional 12,000 oysters in the coming weeks, the team will have added nearly 50,000 adult oysters to the bay, making it the largest single installation of breeding oysters in New York City . . . The four shell beds are made not only of clam and oyster shells but also of tiny pieces of porcelain that have been recycled from nearly 5,000 toilets from New York City's public schools."