The Palazzo Resort, at the time of its completion in 2008, was the world’s largest LEED-certified building. The project earned its Silver certification through a range of efforts, including significant levels of recycled content in the concrete and steel structure. The concrete contained 26% recycled content, including fly ash from coal-burning power plants. Most of the materials were procured from within a 500-mile radius of the construction site to minimize the negative environment effects of transporting those materials. During construction, about 70% of waste materials were recycled, diverting nearly 42,000 tons from the landfill.
Another environmentally friendly construction feature is the concrete parking garage. More than 95% of the parking spaces are underground. This significantly reduces the heat island effect of black asphalt surface lots that absorb heat during the day and radiate heat into the atmosphere at night.