The document discusses indicators for sustainability assessment, focusing on the ecological footprint. It defines ecological footprint as the area of productive land and water required to support a defined human population and material standard of living. It describes how ecological footprints are calculated based on consumption patterns and land use types. As an example, it shows Canada's ecological footprint broken down by components. Globally, the available land per capita is 1.8 hectares but consumption is 2.2 hectares, exceeding availability by 22%. Regional data shows that most developed nations and regions exceed their available land area while some developing areas have surplus. The global ecological footprint has grown substantially since the 1960s.