This document discusses two tools for sustainable tourism: Limits to Acceptable Change (LAC) and Ecological Footprint. LAC is a process that requires managers to define desired resource conditions and take actions to maintain them, allowing some level of change but minimizing impacts. Key factors to consider with LAC include assessing impacts, agreeing on tolerable changes, monitoring impacts, and taking action if standards are exceeded. Ecological Footprint measures the amount of productive land and sea area required to support a population's resource consumption and waste, helping identify unsustainable trends. The document provides examples of how these tools were applied to measure the footprint of the Kingfisher Bay Resort in Australia.