In 2009, following two years of rigorous internal testing, Hilton launched LightStay, a custom-built proprietary system designed to track hotels’ environmental performance. Today, LightStay is our award-winning, comprehensive platform for all environmental and social impact reporting, used by every Hilton property around the globe. LightStay enables hotels to measure and manage energy, water and waste using variables such as occupancy and weather, and to forecast future consumption. Since the debut of LightStay, Hilton properties have reduced carbon emissions equivalent to removing 390,350 cars from the road and have contributed 6,273,934 volunteer hours in their local communities, while saving over $1 billion in utility costs. Through the success of the Travel with Purpose corporate responsibility program, which is supported by LightStay, Hilton is proud to be the only hotel company featured on the prestigious Fortune Change the World list for both 2018 and 2019. Hilton continues to enhance and leverage LightStay as the company works towards its bold Travel with Purpose goals to cut its environmental footprint in half and double its social impact investment by 2030.