People have just started moving into Abu Dhabi's planned eco-city Masdar, whose layout modeled on ancient Arab cities means it can withstand the region's heat while keeping its carbon footprint tiny.
Buildings like the Masdar Institute of Science and Technology are elevated off the ground so that winds can pass beneath it and keep it cool. Elsewhere, vast fields of photovoltaics will provide solar energy to the city. And no cars will be allowed. All transportation will be via electric vehicles in tunnels beneath the city, which is supposed to eventually house up to 45 thousand people