The oil-rich United Arab Emirates is the last place you would expect to learn lessons on low-carbon living, but the emerging eco-city of Masdar could teach the world. At first glance, the parched landscape of Abu Dhabi looks like the craziest place to build any city, let alone a sustainable one. The inhospitable terrain suggests that the only way to survive here is with the maximum of technological support, a bit like living on the moon.