Dongtan

The ambitious green Chinese city of Dongtan was hyped up to be one of the most environmentally friendly cities in the world. But now, like other eco-city plans, work on the project has slowed to a halt.

Flashy plans to build a green city on an island near Shanghai have yet to take any shape. The Chinese government claims the project is still on its way.

This piece from Scientific American looks at plans for three "eco-cities".