Treasure Island lies in the middle of San Francisco Bay, visible to the left of the Bay Bridge as it crosses from San Francisco to Oakland. Abutting hilly Yerba Buena Island, Treasure Island is a man-made island and former naval base created in the 1930s from dredged bay mud and sand. In 2000, plans were announced to redevelop Treasure Island from a dumpy former military base with sensational views of San Francisco into a model sustainable residential community only a ferry ride away from downtown. The San Francisco Board of Supervisors recently unanimously approved a planned $1.5 billion green redevelopment plan for the island, after the San Francisco Planning Commission green-lighted the environmental review earlier this spring. The vote went forward despite blowback from environmental organizations such as the Sierra Club, due to concerns over increased vehicular traffic and potential tsunami risks, as well as community concerns over affordable housing.