The Tower of Burj al-Taqa

Via MetaEfficient, this Dubai skyscraper will generate enough energy to be completely self sustainable. Powered by a wind turbine and solar panels, the behemoth might end up being the most environmentally friendly building constructed on this large a scale. Utilizing seawater to cool air sucked in at the base of the structure, even the air conditioning system has gone green. Treehuggers across Dubai are rejoicing.