In this fragile environment, you have to think green. Photo courtesy greensource.construction.com. I thought this description was cool: "Sustainable-design elements within the main structure include a 3,000-watt roof integrated PV solar array, which provides 100 percent of the trailhead's energy needs. Composting systems used in restrooms will save approximately 200,000 gallons of water annually. Graywater and rainwater harvested from the roof and stored in a 4,000-gallon underground irrigation cistern supplies 75,000 gallons of irrigation water per year. As a result, the project's only utility connection is for potable drinking water."