A rotating skyscraper that is to be built in Dubai and powered by a series of 79 horizontal wind turbines. An Italian architect said he is poised to start construction on the new skyscraper that will be "the world's first building in motion," an 80-story tower with revolving floors that give it an ever-shifting shape. Solar photovoltaic ink on the roof of each floor will supply further renewable energy to this building, which is just one of a new generation of so-called 'eco skyscrapers'

Photograph: Dynamic Architecture/AP