Biologically productive land and water area required to produce resources consumed and absorb waste generated, within a specific population of people. Ecological footprint data can be applied at scales from single products to households, cities, nations, and the global population as a whole. This footprint data is used by governments and organizations to measure and manage sustainability efforts. By measuring the overall supply and human demand on the planet’s regenerative capacity, the ecological footprint tool helps with tracking progress, setting targets, and setting policies for sustainability.