but you also said greenest city in the world. what does abu dhabi care about being green?es sit on some of the world's largest oil reserves, but they are trying to think more broadly about energy now. masdar is their first step in that direction. >> masdar is a strategic, holistic, comprehensive approach to renewable energy, to seriously and in a meaningful way contribute to the advancement of clean technologies. we believe that this is a logical step for a major oil-producing nation to venture into. who knows energy more than us? we are trying to create the home for renewable energy, which is masdar city. >> we are about to get to masdar, the world's biggest experiment in sustainability. this entire thing is supposed to be all of masdar city. it looks like an oasis in the middle of the desert. this is architectural eye candy. >> there has never been a single attempt by anybody in the whole world to do anything as aggressive and as ambitious as masdar city. >> this is definitely a place of superlatives. >> yes, we go big. we do not do things small. when abu dhabi decides t