The United Arab Emirates is a small federation of seven states on the southern end of the Persian Gulf. Its reserves of oil and natural gas have allowed the nation to prosper economically. In recent years, the country has seen a boom in massive constructions: The world's tallest skyscraper is scheduled to be completed in late 2008. Other superlatives include the world's largest mall, an indoor ski slope and a series of man-made islands off the coast made from dredging hundreds of millions of tons of sand from the Gulf's bottom. One of the reasons these projects have moved forward with such speed is the near total lack of environmental regulations in the U.A.E. states. Last month, a new project broke ground outside Abu Dhabi in the hopes of reversing that trend: Masdar City, the world's first zero carbon, sustainable community.