If any city needs help cutting down on its electricity bill, it's Las Vegas. The newest and biggest casino complex on the strip, MGM's CityCenter, is moving Vegas in that direction with its LEED certified sustainable design. The enormous 18 million square-foot CityCenter complex contains more than just the casino, but retail space, restaurants, hotels and residential condominiums. The 4,004-room resort hotel Aria became the first hotel in Vegas to receive the Gold level LEED certification, the nationally accepted benchmark for the design, construction and operation of high-performance green buildings. "From the beginning we believed that intelligent design and sustainable practices would reinforce a sense of permanence for CityCenter and create a healthier, more appealing environment for guests, residents and our workforce," said Bobby Baldwin, CityCenter's president and CEO. MGM said CityCenter saves enough energy from LED lighting, skylight-enhanced natural lighting, and a natural gas co-generation plant on site to power 8,800 households annually. The buildings also recycle waste heat from the power generator to heat water, while water-saving technologies will conserve between 30 percent and 43 percent of water within the buildings and 60 percent in outdoor landscaping.ADNFCR-2708-ID-19424422-ADNFCR