Dongtan Eco City, Dongtan

Masterplan by Arup, for the Shanghai Industrial Investment Corp. In planning stages, first phase to be completed in 2010

Developed by the Shanghai Industrial investment Corp., Dongtan Eco City , roughly the size of Manhattan , will be the world's first fully sustainable cosmopolis when completed in 2040. Like Manhattan , it's situated on an island -- the third-largest in China . Located on the Yangtze River, Dongtan is within close proximity of the bustle of Shanghai . By the time the Shanghai Expo trade fair opens in 2010, the city's first phase should be completed, and 50,000 residents will call Dongtan home-sweet-sustainable-home. The goals to be accomplished in the next five years: systems for water purification, waste management, and renewable energy. An infrastructure of roads will connect the former agricultural land with Shanghai .